I've done a few in ATX but I've slowed down its hard to find any ladies willing to participate in them? But my words of wisdom I would say don't stand around and be ready to step in and preform. If you see an empty mouth, hand or hole put your cock...
Yes I have been part of quite a few. They are alot of fun. But do remember to respect the woman. She has agreed to be used but if she says she needs a rest give her 1 if she has done that it sucks but you're done.
Ok that said just be ready to have fun and if you find yourself having a hard time performing in front of others sit back and watch the show for a few. Than when mouth is empty use,it. I say mouth because even if not all the way hard it can still work. Have fun