Shaun,
If it's Bristol UK, then there's a session every other Saturday in the Plume of Feathers in Hotwells. Unfortunately this is not one of those Saturdays.

Just for reference: Friday night there's a session in the Princess of Wales in Bedminster; Monday there might be one in the Plume of Feathers again, but I don't know what it's like. Every other Wednesday there's a session in the Nova Scotia, also in Hotwells. Those fortnightly sessions usually start with a beginners' session at 8pm.