I hear ya, but I find that if I do to much of that I loose my dancers.
You must maintain enough music volume to keep em movin,and try to get the singer herd the best way you can.And I do beleive in politeness,however I've found that if you let hecklers get the upper hand,you can loose the respect (and control)of your audence.When that happens,it's really hard to get it back.Most of the people who come into the bar where I work are nice and really like what I do.Some (mostly guys )are as##*^holes.And thats before they start drinkin!And above all,they are ALL lookin to SCORE.They are trying there level best to appear macho so they might get lucky,and if that means ripping on the KJ for whatever reason,they wont miss the opertunity.