Seriously awesome advice, much appreciated. By club gig, I just mean it's the first time we're playing outside a coffee house and in a bar setting. It's a little blues joint in the DC area with a restaurant upstairs and the bar and dance floor downstairs.

I'm renting a soundboard and it is the first time we're using this. I have it rented for the night before the gig so we can practice with it. But, I could get it for longer so we could test it out longer.

In your experiences, is one night practicing with a sound board enough or should I practice with it more?

It's a very simple board with inputs for each instrument and the mics and doesn't have too many knobs.