Don't be an entertainer. The reality is, people never remember what you say the next day. Trying to be the funniest, the wittiest, or the most entertaining in a group just makes you come off as an annoying try-hard.
You need to relax, be easy, and listen. People love it when you listen to them. Nod, watch them as they move their hands about gestating, ask the occasional question about whatever stupid shit they're saying. They eat up having you pay attention to them.
If you're having trouble making friends, pick up:
http://www.thepopularclub.com
You subscribe for one month, download everything, then end your subscription. Easy.
Bussing is hard work. You have a lot of time by yourself at your station to think while doing pretty hot, physical work and using the pressure spray to get things off. You get messy. Stuff gets in your clothes. You'll connect well with the other employees. You'll find it very difficult to connect with customers.
You need to leverage your station with the other employees. You own the plates, glasses and flatware. Act like it. For instance, it absolutely sucks when you get glass and ceramic chips grinding in the pump. You have to immediately disassemble the washer to get all that crap out before it destroys the pump. Give people crap if they start slamming down plates or glasses in ways that could lead to chips or otherwise disfigure your plates. Tell waitress they're going to crappy tips if you have to serve customers on chipped, cracked, worn looking plates. Winge loudly about how hard it is to get things like baked cheese off a plate, complain to the cook they're wasting food, no one can eat that, it just comes back to you uneaten still glued to the plate. Yell at the cooks if they throw things at you to wash instead of laying them for you. I had one cook that threw knives at my station from 15 feet away. I politely said if she did that again I'd heave up my garbage can and pour it across her grill she'd just spent 45 minutes disassembling and cleaning. She behaved after that.
Remember, in a food fight, you are Armageddon. No one wants to get in a food fight with you.
When you're getting low on a plate type, tell the waitresses so they can steer orders away from that dish until you can fix it. And tell the manager so he can order more of that plate style so you can serve more.
Biggest health no-no: Bartenders who scoop ice with glass. Invariably they'll chip edges and leave glass shards in the ice, which is also clear so no one can find it, and serve customers glass shard drinks the rest of the night that will cut people up. Go ballistic on any bartender that does this. Tell them they don't deserve your glasses and how they're going to send customers to the hospital with a hole in their intestines. Tell them no one tips a bartender when they cut their lip. Insist they use the metal ice scoop to load ice into drinks. Give them the "I'm watching you" sign language if they even remotely seem the type that would cut corners like that (not in front of customers, of course), Any time you get a chipped bar glass, set it aside in the back room and give them hell next time they come in back.
Always go home to shower and wash your hair before you go to any afters parties with your co-worker --they'll always be surprised how well you clean up.
Social circle to meet girls of your co-workers. Once that pool is dried up, change jobs and meet a whole different set.