My coworkers chose to do The Bank room one evening as a team building event. I was afraid it would be too easy since we had 6 people (the maximum). However, we were very entertained and only solved the puzzle at the last minute -- we asked to not be given many clues, but I suspect the difficulty could be dialed up or down as needed. We had a great time. I appreciated that this was just natural adrenaline, no scare tactics. We'd love to go back!
One word of note, it's a little tricky to find because it is in the basement of an odd building. However, we were able to follow signs and ask a security guard.