No you don't have to be 21 to attend. The bigger the party the better. If you're attempting to ater one of the FABULOUS shows with a large party, I'd suggest reservations. If you're just going to grab a bite and take in the atmosphere then your good too. Special events are posted on their web site with age requirements. I hope you enjoy Hamburger Mary's as much as me and my group of friends do... ENJOY!
No. It's a regular restaurant. They may have some events late night that might have an age limit.
Thanks! Your answer is awaiting moderation.