I am struggling with this a little right now. My drummer is good at holding the tempo, but not as good at setting it. My guitarist is horrible at setting it. LOL. This is a problem since they start most of the songs. Granted it is difficult to set a tempo when you are coming right out of another song. We do not have time in between to hum it to yourself first or whatever. I also think the tempos are more critical when we play dance clubs then when we play other bars. I am just about to start using click tracks to at least start us off. We are always good at grooving and keeping a tempo, but sometimes I feel we are just a hair too fast or slow for optimal dancing.