Did I get ripped off?

Well here's my current situation. I'm a 16 year old girl, who was filling in for my piano teacher on Friday at a Yacht Club. I got paid $150 to play for 2 1/2 hours [I'm very pleased with that amount]. Then, this man came up to me and asked me how much I charge and I don't normally play for anyone so I said "$60 an hour" because I didn't know what to say lol then I realized that was a bit much for my age, and hes like "Oh, I thought that would be how much it cost for 3 hours, because if that's how much you would charge to play for 3 hours I'd love for you to play at my club on Sunday mornings from 11:00-2:00. I don't have a job and I really need money so I said yes, the thing is.. the club is like 45 minutes away. So I'll be getting $20 an hour to play piano, did I get ripped off or is that a sufficient amount for my age? I mean personally I'm happy considering most teens my age would love to make 20 an hour and plus I love playing the piano.