Well being a small club I guess you're not looking at overkill here in any way and something that sounds nice. I know some people might slam me for this suggestion but one of the best systems I've heard for small clubs my friend own here in town was one of those Bose L1 systems...well they have two or three of them with the entire setup. It just sounds so awesome and work great for a small venue. I've been in some small clubs where they will just build a booth for the mixing ect. racks some cheap power amps,eq and maybe a compressor for live vocals with a power strip and snake to the stage then hang some Peavey speakers off chains with monitors and a sub on the stage...I find it gets a bit crazy sounding with the fact it's small where one speaker might have to be lower than the other because it would blow the peoples head off at the bar! A small venue can be tricky but I stand by my suggestion as I've seen that system in action at many small clubs and it's amazing how it works! You don't even notice it's there and it has a great full big sound for big bands to club nights with djs! It really does the trick for those volume issues with small venues so that it's nice and loud but no crazy bass build up or fatique on the audience. It may save you some time with excessive treatment in the long run.
They are designed just for this purpose.
http://www.bose.com/controller?url=/...tems/index.jsp