A thing muggles do. You get a group of people, or I suppose you could do it alone, and you pick what room you want to do. They've all got themes of some sort. And then they give you a time limit -- the more difficult to escape from, the more time you get -- and lock the door.
Your job, as a group, is to solve the riddles in the room before time expires and escape. If you beat the timer, you win. If you don't, you lose and they let you out.