Joe,There are a couple of regular sessions not far from Micca's. On Thursday nights there is an Irish session in Stratford (10 minutes by bus from Micca's) where singers and players of music from other traditions are welcome. On Fridays I think there is a bluesey session not far away and on Saturday afternoon the blues singers have been seen playing in the bar of the Theatre Royal, Stratford. We can probably find more.
Liz and I are only 15 minutes walk from Micca's.