The public mens room Glory Hole is almost extinct in America. So quit yer bitchin and go make a GH.
All you need is a 4 inch hole saw and a cordless drill. 4 inch is about right, big enough to get the biggest cock and balls through but still keep it kinda anonymous. If you want MORE go into the next stall with him. Make it 3 foot from the floor because its about the average cock height and its better for a short guy to stretch than a tall guy to scrunch.
The hard part is finding a good spot. You are going to make some noise. You need a wood wall. If they board it up give up.