I see gotong royong all the time in the gym. Hah hah!

The gym owner is typically working her rows & deadlift on the bench press, tethered double squatting on the smith matchine, the hammock curl while spotting.

Hammock curls = 2 persons face-to-face, the spotter lift the weight up together with the trainee & it looks like a hammock. =P

Nah, chill man.
He was just pissed off at another person who doesn't wipe off after they use a bench.

No need to feel too personal.

Anyway, it's good habit to wipe off your sweat after you use it. It's really irritating. Don't be like China man. Dumbbells + barbells littered all over the floor... it's like doing an obstacle course just to move from 1 place to another.
If you try to talk them into being considerate, they get pissed off and talk bad about you, then never return to the gym again.

I kesian the gym lady who has to pick up and put ALL the dumbbells back to the rack every night. She probably deadlifted + farmer walked a totally of 300kg every evening.