Ok, so this weekend we are playing on a 3 band bill at a local place that has always done right by us. The bar is offering $100 plus 10% of the bar take, no cover, for all the bands to split. Ok, so normally we'd just split it 3 ways and call it a day, however... We were originally supposed to be playing in support of a touring band that disintegrated about 3 weeks ago. Club also never booked an opener. So my band started scrambling, posted ads, sent "cold call" emails/FB messages, etc to fill the bill. We came up with a good bill, IMO, and both the bands and the bar should do well. I also designed and published the posters/web banners for all the bands to use. My question is: Since we did so much promotion work, are we justified in taking a small cut, say 10%, off the total pay, and then splitting the rest 3 ways? Thoughts?