Think we had another similar thread recently?

Anyway, the best resource I know of is little bird told me

Probably everything club wise operates on a monthly basis so you need to move around a bit. The usual format is a sing/tune around. I tend not to get out to them, generally preferring on the increasingly rare occasions that I do go out to play to opt for Irish instrumental in Norwich but I would describe these other folk events as being very friendly and welcoming.