I usually don't go to nightclubs, not because of what they are, but most nightclubs around me don't have anywhere to sit and talk that isn't cold and outside.
I like to dance, but that's not exclusively why I go to a nightclub. I go to watch everyone I know get drunk and act like idiots with them, dance when I fancy it, and have a good old natter. So yeah, if there's a good place to sit and talk, as well as a good place to get pissed and flail then I'm all for it.
Best nightclub experience:
Last time I went out to a gay-bar with my girlfriend and her house-mates. Met a couple of people who were pretty amazing, had a little bit of dancing, but mostly just enjoyed meeting new people and the odd person hitting on us or bumping into people from the past. Also drank the most I've ever had, and renewed my confidence in drinking.
Worst nightclub experience:
Going out when I didn't particularly want to, with a lot of people having fights for whatever reason, a friend of ours going home and getting herself in a stupid amount of trouble, and I had to bail her out and almost got into a fight over that. Just lots of alcohol-fuelled aggression. I swear, if anything supports the legalisation of cannabis, it's alcohol-fuelled aggression.