I was with a couple at the 13th floor. The 13th floor is a swingers on premise club. The three of us went into well semi-private play room. The room has twin beds scattered against the back of the walls seperated by a a feet or two. Each bed is surround by a semi-transparent red drapes within a dark room and some "night lights" can be seen through enough if your close enough. Very hot by the way hearing and smelling all the sex going on.
We moved to the back room where a bed was available against the corner wall so only one bed was only a couple feet from ours. She was on the center of the bed giving me head while her husband was eating her out. Yes somehow we managed to fit 3 of on a twin ed, lol. We could hear the couple next to us getting really busy and obviously got worked up and moved the sheets off the bed exposing the very slippery plastic cover under and heard the lady catch the edge of the bed as she silently thudded on the floor inbetween us. We all giggled a bit.
About 10 min later she had asked me to fuck her first so I obliged. Her husband and I did a bed carousel. I stood up from the head of the bed and tried to walk on the side of the bed. Remember the slippery plastic lining under the sheets? Well I stepped on part of a loose sheet and loss footing and slipped back onto the floor and falling back to the bed next to us and my legs thudding against the floor. Yes it was loud enough for everyone to hear. There are approximately 10-12 beds in this small room so about 20 something people you could hear all stop and start giggling or laughing as did we and the couple next to us.
Later on we met up with another couple that we were with as well. They were explaining how they were in the room and how they heard someone fall on the floor and how they started laughing.
I of course smiled and blushed a bit explainging that was me.