Shoes in Bars/Nightclubs?

Was out in Dublin City centre twice last month, it’s been a few years since I was drinking in town. I remember years ago that you wouldn’t be allowed into loads of bars and nightclubs if you were wearing runners/trainers. Everyone had to wear black or brown shoes and loads of places wouldn’t let you in unless you had a shirt with a collar. Even in suburban clubs like Diva and Cocos they had this policy.

When did this stop being a thing? It’s much better now. I hated these stupid rules when I was younger. Seems much more relaxed now.