A lot of club dancing will depend on what kind of club it is. Generally, if you're thinking about the packed clubs where everyone is on top of everyone, then yeah -- it's not so much dancing that's happening, but bumping and grinding and making eyes at someone you might find attractive.
But that's not the only club there is. Smooth Jazz clubs are a bit more low key. The music is softer, the setting isn't packed, and a certain type of person goes here: not someone who's necessarily older, but someone who doesn't want too much noise and people. In this case, and depending on the vibe the club is going for, there's little to no dancing. Rather, people are sitting down, listening to the music, and making eyes across the bar or their booths.
I'd say it'll be better to look up "clubs scenes" in older movies and compare those to "club scenes" in recent films. You can also find more scenes in music videos.
But yeah -- there's a diverse vibe when it comes to clubs.