These seem a little bit too hot, exposure wise. The second shot has a good interaction between the two girls, but the guy getting the neck-squeezing hug from his drunk GF in between them, in the background, kills the shot. The last one...that talllllll,skinny crop....not working well as shown. CROP OFF the bald, chrome-dome behind the girl on the left, and it helps a lot.
This is an entire genre of photography. I used to know a guy who did this stuff in the early digital era. It has its own 'rules', and there are several different styles, different ways to actually make the photos. You need to do it MORE to learn how. One night, or one weekend isn't going to show you much. Are you gonna do it all "candid", or are you going to pose and direct people? Do you really want the flash to "carry", as far as it did in shot #2? because with FAST shutter, that would be a black background shot, and the dude and drunk GF would be....not shown...but as-shot, the flash is carrying allll the way to the wall.
Are these horrible? No. Are they great? NO. These three shots are somewhere in betwen horrible and great.