Workout pants that don't fall off

So, this is going to sound odd, but I've gone through a few dozen pants looking for ones that stay up while I move around.
The issue is that I have a line of pooch right at the top of my butt and all the way around. If the pants sit right below the pooch, they're a little too small and slip off. If they sit above the pooch they eventually get sucked under and then fall off.
I've tried looser pants, tighter ones, leggings, capris. But eventually I'm hopping around at Zumba with one hand holding up my pants.
Anybody else with a similar problem find any solution?