If I'm undercut out of a gig, I try to at least talk to the owners or manager, and ask them to review their sales figures in a couple of months time. If the new, cheaper, and generally lesser entertainment has ended up COSTING them sales (who wants to hang around and get a few more drinks if the entertainment is that lousy? ) compared to when I played there, I ask them to give me a call back...

If not, good riddance to them!

You would be surprised at how many find out, to their chagrin, that lesser entertainment often DOES equal less sales. The hard part is making the managers understand that it WAS the entertainment change that lead to the drop-off. They are notoriously hard to get to admit that the good entertainment was the cause of their profits (otherwise it would be easier to get a raise!), and that dropping it was the cause of their decline.