I started seriously last season at 23, I'm 24 now. I went once or twice when I was about 8 or so, and then a few times when I was 17. Wish I had kept it up then though, I quit when I moved to Japan six years ago because I thought it would be too expensive and crowded. Went last year for the first time, and it turned out to be the opposite. It can be crowded, but it's comparable if not better than the States. Relatively cheap, too.