I go from piece of equipment to piece of equipment, usually 4 exercises for 3 sets.  I am not bothered if someone takes a piece of equipment, or a weight.  If that happens I just improvise.

Hogging the equipment.

Guy at my gym should just be called Noah - cause he's got 2 of fucking everything

Hahaha. Sorry but this made me laugh

You mean you're not into licking it off? hehehe

If it was a hot fella, HELL YES I'd lick it. But sorry….this guy wasn't my type

People not wiping the machines, after they sweat like pigs on them.

Ugh. There was one guy working out on a machine and his stench pretty much was given off in a 5 foot radius. He got off and I I could visibly see these huge droplets of his sweat covered on the machine. Did he go back to clean it? Nope….

One night I had this beefed up steroid thing stand right in front of me and pretend to flex in the mirror… but check to see if I as watching him.
When I moved... he moved too.

That's what's bothering you? Seriously? You just made my cock stiff with your post. I'd be drooling all over that steroid beefcake. Talk about injustice, huh?

That is my biggest pet hate. Sure... check your progress, I am guilty of the occasional flex myself... but don't shove it in front of others just to show off. I'm trying hard to get bigger as much as I can... leave me be.

If you love yourself that much... go home, get a mirror and use your left hand for you know what.

Guy at my gym should just be called Noah - cause he's got 2 of fucking everything

I could go on.

Uh, I haven't been to too many gyms, and I'm really new to bodybuilding and fitness in general, but I do have a pet peeve.

Insanely loud music.

I tend to not like overly loud sounds, but one of the reasons I tend to work out from home is the idea that a gym might have huge speakers that they blast music from. It doesn't even really matter what kind of music they're using, even though I like some genres less than others. When it gets to the point that my ears pop from the pressure of sound waves from speakers, I just think "fuck it" and leave.

Has anyone else experienced that? I feel like I'm in kind of a minority here.

I've been to gyms that play fairly loud music sometimes but as tuckstee mentioned, I've tried bringing in my headphones and put those in during my work outs. Sorry to hear your gym plays music that's so damn loud though. 

Those are a few

Loud music can be a nuisance as well. I take my headphones and hope for the best.

Insanely loud music.

I tend to not like overly loud sounds, but one of the reasons I tend to work out from home is the idea that a gym might have huge speakers that they blast music from. It doesn't even really matter what kind of music they're using, even though I like some genres less than others. When it gets to the point that my ears pop from the pressure of sound waves from speakers, I just think "fuck it" and leave.

Has anyone else experienced that? I feel like I'm in kind of a minority here.

I flex in the mirror to see my results, for a few seconds each visit. I only flex the muscle group that I was working on during that day (so biceps and back one day, just my legs another, etc.), and only for a few seconds. I'm not doing it in hopes I'll be noticed. It's to see the visible effects of the hard work, and remind myself that it's why I'm there. And that's it's working.

Something, on the other hand, that directly impedes the workouts of others? That's where I start getting ticked. Blocking access to the weight rack or trying to hog 2-4 machines or several dozens of square feet of the gym at once for 15+ minutes so you can get your super-intense circuit in is obnoxious. A workout that requires you to completely dominate 10% of the gym at any given time should not be done in a public gym at peak hours (between 4:30 - 8:00 ish).