I'll sign up for one, Midcheshire-ish. (as a learner, NOT a leader)
There is a band workshop once a month at Rainford near St Helens Lancs where we play from the dots. Dance music, for Playford and other club dance type. We have a core repertoire for the 2nd hour, and something new for the 1st (music in advance).
Not quite the same as playing in a session, but an interesting experience, and we get the chance to play at local club dances if we feel up to it.

See you at the Chippenham and Whitby events.