I work out in a gym alone. That's how I prefer it. I don't mingle or really even talk to anyone, just a few nods here and there. I'm very observant, however, and have noticed the following:
1) Those who know what they're doing in teh gym. This can be broken down into categories. People like me who know what they're doing, but are quiet and don't dress flamboyantly (tights, muscle tee, UnderArmour, boots, spaghetti-string tees, etc
) Then, you have the loud, obnoxious folks who kinda know what they're doing but look like complete morons with their "attire". These are the lifetime perma-bulker tough guys
BTW, nothing better than a good-lookin chick who knows what they're doing in teh gym.
2) Those who don't have a clue as to what they're doing in teh gym. This group makes up about 99% of most gym's mbrshps. 60 yr old men doing stiff leg dl's, rounding their backs, going down too far or the 40 yr old fat woman performing a standing pec-deck-like motion with a pair of dumbbells thinking she's increasing her tit size. These folks are dangerous and annoying. They're bodies are proof that they're clueless.
3)Those who get dresses up, do a little cardio, maybe the ab machine and then mingle. Perhaps, they just like to talk or maybe they're trying to hook up with someone. The gym is like their night club w/o the booze.
These are the 3 basic categories of gym goers in my experiences. Any other input is welcomed