Best gym or fitness classes in Hull?

[PearsonParkRunner]

Trying to find a decent gym in Hull that isn't just rows of machines with grime music blasting at full volume. Ideally something with good free weights, maybe some classes, and staff who actually know what they're talking about.
I've tried PureGym near the centre and it's fine for the price but it's rammed every evening between five and eight and getting a squat rack is basically impossible. The equipment is alright but nobody cleans anything and the changing rooms are questionable.
Heard good things about Endurance Fitness in the Avenues area but haven't been. Also someone mentioned a CrossFit box near the marina that's supposed to be really good but I can't remember the name.
For running I've been doing Pearson Park, the marina loop, and the Humber Bridge. All great routes. But I need somewhere to lift weights in peace. Recommendations welcome.

 

[EastStandLad]

Iron House Gym on Anlaby Road is where the serious lifters go. It's not fancy. No smoothie bar, no spa, no towels folded into swans. Just proper equipment, heavy weights, and people who actually know what they're doing. About twenty five quid a month and it's never too busy because the casual gym goers won't set foot in there. If you want to actually train and not just take selfies in front of the mirror it's the best in Hull.

 

[TigerLily_HC]

I do classes at the Leisure Centre on Beverley Road and they're really good. The spin classes are intense and the instructors actually push you. Costs about thirty quid a month for unlimited classes which I think is decent. The pool is a bonus if you want to swim as well. For something different there's a boxing gym on Spring Bank that does fitness classes for all levels. My friend goes and absolutely loves it. She says it's the best stress relief after a long day.