In our area (N Derbys/Notts/S Yorks) there are numerous nights to choose from all have their own music policies, generally you know what your going to get ie. go to one you know your going to get 100% oldies another more crossover/rare soul.
What's really getting annoying is the inconsistency. You go to one night and its great, good music and well attended go the next month and there are only a handful in, miss a month and then you get reports that it was full!! Just don't know why sometimes.
A good example was last night we went to Vault of Soul at the cube in Sheffield. Been a few times before and its been well attended, last night a handful in. Where was everybody? Despite this, still was a great night though.
Someone has commented about the logic of having something every month and I think there is a good case here. Take somewhere like the Empress Ballrooms in Mexborough where its only Bank Holiday Sundays, always packed and a fantastic night.