I keep getting them, often freely offered without me asking (after me approaching her first and chatting a while). I'm talking about the bar/club context, and that may have a lot to do with it.

Some don't answer, most do, but nothing ever happens. Seriously, ever. Only time I've gotten a girl's number at a bar and something happened is if I already hooked up with her.

I'm thinking of refusing them even when offered in the future. I'd say it in a nice way, like "I don't really like getting numbers, it doesn't seem to go anywhere a lot of the time." Maybe if she was really insistent, but not otherwise. Thoughts?