$27 per person and most rooms fit groups of 10 people comfortably.
Our price for our 60 minute rooms are $30 per person. Our rooms sizes vary from 6-10 people depending on the experience.
You also want to make sure you don't have so many people that someone is standing around with nothing to do. We've done escape rooms with 8 people and at times there wasn't enough to keep all of us busy. The experience is still fun, but it's something to consider.
We did amnesia and had 8 in our group, it was a bit tight but workable.
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