Marje, my experience is that 'Singarounds' and 'Sessions' are far from exclusive - there are usually tune-players at singarounds and singers at sessions, and they're always welcomed (at least in my patch, Lincs/Notts/S. Yorks). I think the terms 'Singaround' and 'Session' tend to describe the general purpose for the evening but, as with most things, a bit of variation improves pleasure! :0)

You're quite right, Market Rasen is indeed a folk club as distinct from an Open Mic, and is run by Villan in a very professional manner on alternate Fridays. The standard of performers there is generally quite high, but less-experienced artists are welcomed (how else would they become experienced??). It's recently moved to an excellent new venue at Walesby, Lincs., and is well worth a visit.

Gainsborough FC is a singaround in a private room in a pub (The Drovers' Call), on Fridays alternating with Market Rasen, where all are welcome to perform or listen in a very friendly, smoke free atmosphere. Banter and personal abuse, though not compulsory, are welcomed and encouraged! :0)

Why not try them? (And bring yer mates!)

SJ :0)