This reminds me of a quote from the BB that I really like when I'm feeling weird about going places that I normally would go to drink.
"So our rule is not to avoid a place where there is drinking,
if we have a legitimate reason for being there"
You had a legitimate reason for being there. It's not like you were just going to the bar to hang out/be miserable sitting there...you went out to see a band and have fun which it sounds like you did! I've been in a lot of these situations recently, shows, friends birthday parties, weddings, baseball games....and you just have to remind yourself why you are there.
Good for you!
