Sessions can have their own rules for guitars, Ake. Some may even have their single established guitarist and another player would not usually be welcome. You have to take that how you find it per venue.

I'd agree with the accept limitations. I guess if I really wanted to play like anyone on guitar, I'd be playing like Chris Newman but that never would be... Same with banjo really, I love the playing of Barney McKenna (Dubliners) but never would be as good. Still one finds places where one can fit in and enjoy...