Silat (of which there are many, many styles) seems to have shot up in popularity almost overnight. I'd personally be a bit wary of learning an esoteric style such as Silat, just because if it's not common it's hard to tell if you're learning from a good school. One of my friends absolutely laments that there is no place for him to learn Sambo. Though if you have the opportunity to check it out, jump on it. You might learn a thing or two.

As for being a dedicated student, don't worry about committing to an art 100%. The majority of people that go to these gyms do so as a hobby, six months on, six months off, sometimes skipping classes for other things. You get out of it what you put into it, and if you're not looking at competing, you don't have to give it your all. Myself personally? I was never going to compete. I wanted to learn boxing to be a coach. That's the reason I was always going myself. That said, you should still find a good school so you find worthwhile techniques. If you're gonna learn something, it's best to learn it right.