Nellies itself is just guests, who usually do 2x35 ish plus as many floor singers as we can fit in, so yes, you'll be very welcome, fliss.
The Beacon in (just outside Tunbridge Wells) has a guest night usually on the 2nd Monday and a singers' night on the 4th Monday, and locally Travelling Folk (on the Beehive I think ) have sessions on the 1st & 3rd Thursday of each month at different places, so there's a bit of something for everyone.