Someone told me about this place so I booked a spot online. They allow for 8 (or so?) People in a group per room, strangers or known. The website says to arrive EXACTLY 15min prior to your time slot. We arrived too early so we had some drinks at Hough's across the street. We were in a group with three other couples? ... I think. (Things get crazy in the room -at least my experience).
Let me say this was a lot of fun. I would recommend taking someone you already know a bit, and people who aren't timid, or on a first date! The stimulus is exciting and it really got me moving around a lot. (Don't run - against the rules) the room is full of odd things to piece together to accomplish the goal. My recommendation would be to keep track of the order of clues, one leads to another.
Have fun and don't be late, you owe it to the group to be on time.
PS: I purposely rambled on not to spoil anything!