Inappropriate meet markets

Sara's blog post about dating at the library makes me wonder: Are any places off-limits when it comes to meeting a romantic partner?

My answer is the gym.

I think you should have the freedom to get sweaty on the treadmill without being interrupted by someone asking for your phone number.

And as someone who's received one too many pickup lines in the reference section, I can see how the library could be considered an off-limit meet market as well.

Any other inappropriate meet markets?