Back in the day, there were rave/dance type clubs which were all about the dancing. They'd typically have focused genres of music, well known or regular DJs, etc.
Then there were more generic nightclubs (usually in University towns) which were where people went to either get drunk or hook up. Those would typically not focus much on music (usually playing crowd pleasers, 50s/60s/70s/80s/ tunes etc.), and instead bringing people in with cheap drinks offers, foam parties, fancy dress nights, etc.
Back in the day, there were rave/dance type clubs which were all about the dancing. They'd typically have focused genres of music, well known or regular DJs, etc.
Then there were more generic nightclubs (usually in University towns) which were where people went to either get drunk or hook up. Those would typically not focus much on music (usually playing crowd pleasers, 50s/60s/70s/80s/ tunes etc.), and instead bringing people in with cheap drinks offers, foam parties, fancy dress nights, etc.