Mustafa is the only pro I saw in real life and talked to - his gym is in Vienna/Austria.
Not a fan of him, but he is an eloquent guy and can motivate people.
Surreal forearms - even when he's off.
The gym is terrible - broken machines, weights just strayed across the room -> takes some time to find the right plates that go along with the right bar.
Dumbbells only go up to 110lbs - sure heavy enough for me, but I expected a little more in a gym of a professional bodybuilder.
Trained there for 3 months - never again.