The best way to have fun at the club for me is to fake it. I really don't care for the club. I'm happier playing soccer. So, why do I go to the club? Well, at times I can get too carried away doing personal stuff and being by myself so in other to be around people I have to get out. Why the club? Well, a lot of times my friends who are crazy about the club are there and sometimes that's the only way I can get to hang out with them.
So, back to your question...well, like I said I fake it. I watch the way they "act" and act that way too. Sometimes I just observe the funny things that people do. Interacting with my friends is fun too. The best way to have fun at the club is to get rid of the mind set of going there to pick up a girl to take home for the night. When it doesn't happen you feel disappointed. Occasionally, I allow myself to get caught up in that mindset and I don't like it. To me though the club is getting old, the girls don't seem to really want to interact. You want to dance with them they'd rather dance with their girl friends. When you do dance with them and make some connection they won't leave with you because they came there with their friend etc. Most times I come out there because my friends request for me to come. Someday I'ill fidn the strength to stop going there, lol.
As far as meeting people in general find social events to get involved in such as sports, gym, dance, volunteer work, coffee shops, parties, unusual opportunities such as finding yourself in a grocery store aisle with a girl and finding a lame reason to make conversation. Well hope I could help.