We rehearse in quote a large warehouse space. It is comparable to the size of most bars in our area. Metal building, concrete floor, high ceiling. It is great because we can set up everything just as we would in the club with lights and everything. The problem is with reverb in that metal building. It is not too bad when we play low volume but if we want to practice at normal level, the reverb/echo is pretty bad. I've been trying to figure out what we can do about that for very low cost. We have carpet under the stage area. I could put in a drop acoustic ceiling above the band area and wall in our space but that would cost too much. I'm thinking cheap or almost free. Maybe some type of curtain material that would prevent the bouncing of the sound. Any suggestions or experience with this would be greatly appreciated.