I believe and know to some extent that clubs do meet and have regulars and guest booking policies ~ best is either a sole enterprise or a well run and set up committee! all have pitfalls

Note that clubs are not necessarily all Concert clubs who predominantly book guests and have a wide remit of choice, good for the professionals

Sessions to my mind are different: Mixed sessions instruments, melodeons largely with strings and reeds also and songs usually chorusy ~ or just music sessions of course

Workshops usually attracting up and comers in specific types of instrument, or song

Unaccompanied song sessions with harmony type ideas

Do students bother to read any of these postings?

Ray