Don't forget that if your event is in a pub / pubs and/or public premises these venues are already licenced to hold a set number of people. It is their licences and certificates that are in force whan you run events in them. It is up to them to say 'No, sorry, no baby juggling and piano swallowing here!', but you must comply with their rules or risk being evicted:-(

BTW - Is there realy an organisation called Folk Arts? Surely in keeping with current thinking it should now be renamed f-arts...

:D