I know it well! Wandered in there on my own in Summer 1971 and it was full of hookers and Skins......then this guy staggered across the room with his head split open. Very intimidating place with guys trying to stare you out! I was just gone 17 and it was my first time out of Swansea.
Anyway, a full crew of us from Swansea, Gorseinon, and Bont (around 30 in total which included a couple of total psychos) went back there about a year later on bikes, and in cars and vans! Plus, I'm fairly sure that my mate Whippet from Clase had his sawn off in his old Hillman Minx cos he always carried it round for protection from Skins.
Due to an unfortunate misunderstanding we got banned from there within 15 minutes (and the Police got called) cos one of the psychos completely destroyed a metal serving tray by repeatedly hitting himself over the head with it while singing "Mule Train". Why he chose "Mule Train" I have no idea! I told him "Whole Lotta Love" would have been a much better choice!
He eventually got put down for Grave Robbing (don't ask me) and one of the other ones there got life for Murder a couple of years later. I'd estimate half of them never made it into the 80's for various reasons.
Over 50 years later I could well be the only one left standing!
Good days......simple pleasures back then!