I agree that Raggytash has the right idea. Pity he doesn't live in Salisbury. I attended one folk night which took place in a pub back room the size of a postage stamp. The advertised guest fiddler started an hour late because the organiser felt the audience was still not big enough. By that time, some people were already leaving. Despite the smallness of the room, the fiddler had set up massive amplification. After a perfunctory introduction, he sped through his sets with a minimum of dialogue. What an abysmal evening. Never again. So, from an audience perspective, the key ingredients are an open door, a welcome atmosphere, a good host, and a planned evening that ensures something is always going on. If there is a visiting performer, he/she should start on time, use minimum amplification or none at all, and try to establish a relationship with those who turn up to listen. The closer a club comes to being a farmhouse kitchen, the better.