They may be with other participants, but they are monitored by a staff member via camera and audio. I went with my son and his friend who were 14 at the time, and we had a great time.
Not sure .but if one is 18 it should be fine. It's alot of fun if you like solving mysteries and deciphering riddles.
I would call but I see no reason why they wouldn't allow them since one is 18...we had a blast. Only used one clue and finished it.
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