Is there an age limit on how old to get a membership? If so, what’s the age?

A parent or guardian can sign for a child at the age of 12 and must be with them while working out. To workout alone, you must be 16 years of age and a parent or guardian must sign a waiver

What member ship did you have?

I'm 15 and they let me work out alone. Even when I was 14 they let me.