You would put a dollar on the tip rail, as commonly done in many clubs. But the stage dancer would not take your dollar right away when she came over. There would be a button for the dancer to step on in front of each seat at the stage. The button would start a timer for a certain number of seconds. (A light would flash when time was up.) When time was up, only then would the dancer take the dollar and move on. A dancer could stay on stage as long as there was a dollar waiting for her, or there was no other dancer waiting to go on (so the start/end of songs would not matter). A customer would have to put down a dollar when he first sat down at the stage. When the next dancer came on stage, each customer would have to put down another dollar, or give up his spot at the stage. Maybe each dancer could set the number of seconds for a dollar (with an LED display showing the number of seconds).
I think this would be good for any custy for whom the stage show is an important part of the SC. It will mean that the dancers who turn on the most (non-freeloader) custies will have incentive to be on stage a lot, giving custies more reason to be in the club and tipping at the stage. Classic benefits of a free market, where everyone who's willing to give something others want will get more of what they want. As long as the stage is not in the dancer's money zone, stage shows are going to be mediocre at best. If dancers could make decent money just stage dancing, it would attract a lot of hot women who don't want to be pawed by a bunch of strangers. (We don't give lap dancers near enough appreciation for putting up with this.)
Not an idea I'd endorse. The only thing a stage dance does for me is to allow me to see as much of the dancer's body as possible.