I wonder what kind of reaction I would get if I asked all you fifty-year-olds who are playing blues, Eagles and Santana covers, to stay home with the wifey and the minivan and not to "compromise" gigs for young bands with original material.
To be completely fair, the original "scene" is a slightly different critter. There is usually less money and since each artist is playing there own music, the possible overlap between the pros and the weekenders isn't the same.
That being said, try demanding to be paid. Seriously. It works more often than not. If you don't value yourself and your music, then neither will anyone else. I worked with a solo artist a year or two ago that had been stuck in the "I'm pushing my CD so I have to take free gigs" school of thought. I encouraged her to demand payment. She tried it and lo and behold, she got it.
PS: I'm not a 50 year old playing blues, Eagles and Santana either.