I stopped at 50. I was in a successful wedding/cover band for 10 years but the gigs every Friday and Saturday were too much for me. We had a 14 foot trailer with full PA and lights, the works. I've pretty much always done cover bands since I started at age 16. In the end I was more worried about driving home at 3:30 a.m. and getting hit by a drunk driver. I still play at home but have no desire to be in a band again.