Breezy's not quite right about Herga.   I learnt a lot of songs when I was in my teens because floorsingers got free entry when John Heydon was running the club, and we had guests every fortnight.

IIRC it was MCP who pointed out in the 90s that charging floorsingers would bring in more money than putting up annual subscriptions, because so many of the club members wanted to sing, and it's the singers' nights that pay for the now monthly guests.

Kitty