I think everyone thinks we are all having such a good time on Friday and Saturday nights that we don't need folk clubs!
Oxford Folk Club is on a Friday night, they appear to have Mick Ryan and Pete Harris this week:
http://www.oxfordfolkclub.com/events.html

You could check out the Herschel Arms in Slough, but they usually have music on Sundays and Mondays. But you never know, they might have something special on.

Good luck
Helen