"Mustachianism" is not about being frugal to the point of depriving yourself of all your hobbies. It's about being extremely efficient with lowering fixed costs, being acutely aware of wants versus needs (and making decisions accordingly), understanding that money can buy time (and thus early retirement), and allocating resources towards where you want them to go. This last part includes hobbies.
So this is not about depriving yourself. If you think that, you're doing it wrong.
I personally go to hugely expensive sporting events every year because I cannot put into words how much I love going to them (similar to the music addict above, I guess). I went to three Ohio State games this year (including the Ohio State-Michigan game), a World Series game (go Tribe!), etc., and even a couple Bruce Springsteen concerts.
All of it was well worth it, and I don't feel bad about it at all because I'm very efficient in other areas (no car payment, small mortgage payment, no cable, etc.).