Our club doesn't even have a committee but has been running for 20 yrs. Not sure how it works but it does. The MC decides on the guest list and books them, as well as being the treasurer. I do the publicity but have no say in the bookings. No-one else can be bothered to get involved in the running of the club, they just like turning up and either listening, singing or playing. There is no democracy in a system like this, but it obviously works as we are still going strong!!