Did the same thing for my league team. If you can find a nice used set of Aramith Premiers or Aramith Premiums for a good price they will be a huge improvement over a set of grungy bar table balls. Try to make sure that whatever you buy includes the Aramith cue ball. No sense in using a decent set of balls with a dirty, heavy mud ball.
Do you have access to a ball cleaner?? You will want to clean the balls after using them. The balls will pick up a lot of crud from the cloth and the pockets.