Wow... Where is the most unusual place? There've been quite a few.
The lawn at a park in the middle of the night. A golf course. On a gymnastics mat in the gym in high school. My office. The bathroom at work. The bathroom at a fast food restaurant. Wait... the employee locker room at a movie theater while Indian Jones and the Temple of Doom was playing. She was a theater employee. I didn't work there. LOL
The weirdest swinging experience. Had to be the very first time we met someone. We met at a restaurant and hit it off pretty well, so they invited us back to their house. We picked-up some beer on the way over and sat around at their house drinking and talking for awhile. The husband started talking politics and spouting all these crazy conspiracy theories and his wife was getting rather irritated. So she suggested we get in the hot tub. She said there were robes and towels in the guest bathroom (I guess they were pros being that prepared) so Mrs. WS and I retire to the bathroom to undress. This being the first time we are freaking out to each other when through the wall we hear them start arguing, and she is really giving it to him about what a jerk he is. Then they waltz out of the bedroom like nothing is wrong and we all go out to the hot tub.
Once in the hot tub the wife was sitting as far away from us as she could. Her body language was definitely screaming she wasn't in the mood. The husband reaches over at tweaks Mrs. WS's nipple like plucking a grape from the bunch. So we get out of the hot tub and we go inside where the husband puts on a rock concert DVD and starts rocking out and going on and on about how this is the greatest rock band ever, etc. Well the wife says "I'm tired, you have to leave." She literally hearded us out the door as we are trying to get our clothes back on. We were still putting on our shoes on the porch.
We've never heard from them again or seen them at any party since.
Mr. WS