Not every show I do is always the same, I may get 175-200 for a straight Karaoke show, but if I am doing a wedding or a private party my rates are 350-550 for one show.
Usually, the Legion Posts and the VFW's I work have a straight 175-200 fee, no exceptions, however I am allowed to put out the tip jar and I will generate another 50-100 bucks on top of the 175-200, so it comes out in the wash. At least for me it does.