RACK What is Rack?

Risk-aware: Both or all partners are well-informed of the risks involved in the proposed activity.
Consensual: In light of those risks, both or all partners have, of sound mind, offered preliminary consent to engage in said activity.
Kink: Said activity can be classified as alternative sex.

While "Safe, Sane and Consensual" (SSC) attempts to describe and differentiate BDSM from abuse in ways that are easy for the non-BDSM public to comprehend, RACK differs from it in that it acknowledges that nothing is ever 100% inherently safe. By acknowledging that what may be safe or sane to one person may not be considered the same to another, the RACK philosophy tends to be more inclusive of activities that others may consider as edgeplay. There is no "safe" or "not safe" within RACK, only "safer" and "less safe."

RACK can also be described as a mindset which pays more attention to perhaps unexpected consequences of BDSM play. Its theory revolves around reasoned, ex-ante commitment, including the possible consequences of riskier play. In contrast, SSC revolves around the end results of play, or the ex-post. It tries to minimize any potential harm despite the risks BDSM players might be willing to partake in. Both philosophies aim to minimize foreseeable harm, but RACK puts more emphasis on individual commitment to possible risk, beforehand, while SSC tries to minimize total harm foreseeable over the longer term. Thus, RACK adherents stress the value of individual prior consent to even risky fun, while the SSC contingent counters that people often do not choose as freely as they seem, they might behave irrationally at times, and so the consequences of rash individual choice perhaps ought to be mitigated from the start.
BDSM, edgeplay is a subjective term for activity (sexual or mentally manipulative) that may challenge the conventional S.S.C. (safe, sane and consensual) scheme; if one is aware of the risks and consequences and is willing to accept them, then the activity is considered RACK (risk-aware consensual kink).

Edgeplay may involve the consequences of potential short- or long-term harm or death, exemplified by activities such as breathplay (erotic asphyxiation), fire play, knife play, and gunplay, as well as the potential increased risk of disease seroconverting when the risk of bodily fluid exchange is present, such as with cutting, bloodplay, or barebacking.

The mindset of those involved constitutes what is edgeplay because knowledge of or experience with the activity or partner(s) may dictate what and to what extent they will act. The propriety for more dangerous or taboo-themed activities varies by individual, due to differences in moralities as well as trust between participants and experience. The only consistent rule is that activities must not be coercive, deceitful, or injurious without prior agreement or knowledge. This does exclude how others may react to the outcome(s) of the activity if they go beyond what can be handled by the partners.

In the mid-1990s, the Living in Leather convention did not have panels on adgeplay or **** because, at the time, they were considered too extreme for consensual activity. By 2000, some considered them to be within the scope of edgeplay.consequences of rash individual choice perhaps ought to be mitigated from the start.
In the BDSM community, safe, sane and consensual (SSC) are common principles guiding relationships and activities.

The principles are that BDSM activities should be:

safe: attempts should be made to identify and prevent risks to health
sane: activities should be undertaken in a sane and sensible frame of mind
consensual: all activities should involve the full consent of all parties involved. Note, though, that legal consent may not create a defence to criminal liability for any injuries caused; furthermore, this is not necessarily limited to physical injury.

In BDSM, limits refer to issues that participants in a play scene or dynamic feel strongly about, usually referring to prohibited activities. Participants typically negotiate an outline of what activities will and will not take place. The participants describe what they desire, do not desire, will and will not tolerate, including the determination of limits. For example, it is common to set a safeword and to establish certain types of play as prohibited.

The BDSM usage of the terminology "limits" derives from the concept of "off limits", the idea of limiting a scene to a specific set of activities, and the limitations (in terms of interest, as well as physical and emotional tolerance) of the participants.
Both dominants and submissives can set limits. Limits can be agreed to verbally or they can be incorporated into a formal contract. Sometimes the participants engage in a formal conversation about limits and boundaries; this is referred to as negotiation. Other couples discuss their likes and dislikes in a similar manner to "Vanilla" relationships.
"No limits"

Some partners choose not to set limits. This is commonly seen in total power exchange dynamics, consensual non-consent, and edgeplay. Whether or not this type of arrangement is considered "safe, sane and consensual" is a matter of some controversy in BDSM communities, those favoring the approach pointing that limits are either wishful thoughts which can never be reliably enforced, or sometimes, just deceptions in order to find acceptance by society.
The terminology varies slightly across different local communities and Internet forums. However, there are general usages recognized across most BDSM populations.
Hard limit

A hard limit is something that must not be done. Violating a hard limit is often considered a just cause for ending a scene or even a relationship. Examples include “**** is a hard limit for me” or “I have a back injury, so striking on the back is a hard limit”.
Soft limit

A soft limit is something that a person hesitates about or places strict conditions on, but for which they may still give informed consent. An action could be prohibited except under specific circumstances or an area of discomfort that someone wishes to avoid. Soft limits can also include actions that require a cautious approach or — while somewhat appealing — still generate an uncomfortable amount of apprehension in one or more partners.
Requirement limit

A requirement limit, or must-limit, is something without which one or more partners will not participate in the scene. Examples include “lots of hair pulling is a must-limit for me” or “if you’re going to flog me, I’ll need lots of aftercare.”
Time limit

A time limit is a set time period for which an activity or temporary relationship takes place. This is most common for scenes and casual play.

Some couples practice time limitations for relationships. They can be used to set time limits on phases of relationships, such as training or consideration.

So in short if you goto Fetish clubs and your dom/misstress does'nt discuss risky play then you should concider going to another club or seek another Dom/Misstress, at the end of the day you are responsible for your own safetys and even if you give total power the your Dom/misstress (power exchange) they must still discuss risky play.
So be aware of whats happening and use your safe word, play nice have fun and stay safe.