I guess I'm the oddball in that it happens a bit more often for me here in Boston. I've done radio for a long ass time (just had my 25th party, http://laterisersclub.org on WMBR) and people who work in the medical area where my real job is have come up to me to say hi. A post-doc from Copenhagen liked some of the same music (turned me onto Iceage from DK) and I've met some people at non-rock parties with similar taste. Altho it's still the exception. The worst is when you ask someone what kind of music they like and they say "Oh I like all kinds of music" which translates into "I don't really give a shit about music".