you've probably not done worthwhile exploration as to what hobbies you enjoy.
When doing the exploration it makes sense to analyse the hobby beforehand. Motorcicle racing might be as fun as the ecstatic dance suggestion but it's still a worse alternative because fun isn't the only factor.
It depends on the relative costs of analysis versus just trying it, really. If it takes ten hours to figure out which hobby you want to try first, you could have already tried the top three gut-feeling hobbies out for three hours each.
On ChrisHallquist's post extolling the virtues of money, the top comment is Eliezer pointing out the lack of concrete examples. Can anyone think of any? This is not just hypothetical: if I think your suggestion is good, I will try it (and report back on how it went)
I care about health, improving personal skills (particularly: programming, writing, people skills), gaining respect (particularly at work), and entertainment (these days: primarily books and computer games). If you think I should care about something else, feel free to suggest it.
I am early-twenties programmer living in San Francisco. In the interest of getting advice useful to more than one person, I'll omit further personal details.
Budget: $50/day
If your idea requires significant ongoing time commitment, that is a major negative.