Very cool experience. I won't say too much about it, but we had an excellent time. We also escaped so take that into account. If we had lost, it might have been a total bummer.
We did The Apartment and had a party of 10 which is the way I would go. Otherwise, I believe they'd match you up with other people if you don't have a full party.
Would be a GREAT team building experience especially for a corporate event. Make sure you pick the right people to go with you though! Collaborative people are best and not ones who are control freaks. It's about teamwork and communication!