I agree you should be able to lock pick and sneak into Orgys to join or watch. It could be a great skill check for your Troublemaking, Disinhibition, and Charisma stats. Troublemaking to lock pick. Charisma to convince them to let you watch or join. And Disinhibition to actually join.
It could play out kinda like masterbating in the lounge infront of people, Going free Use at the Greek parties, or kinda like when someone takes advantage of you on the bus/when you're stuck in the laundry room. Where it's more about what people are doing to you and how you encourage it. Than a normal sex encounter.