A mini dress that keeps riding up isn't a you problem, it's a fabric and fit problem. Here's what actually fixes it.
Stretch Recovery, Not Just Stretch
Fabric that stretches but doesn't bounce back loosens as you move, which is what causes the climb. A piece like Layla is built with recovery in mind so it holds its shape through dancing and sitting both.
Fit the Hip, Not Just the Bust
If a dress is snug up top but loose through the hip, it migrates. The hip is what needs to be fitted snugly for a mini to actually stay down.
Silicone Hem Grip
A thin strip of hem tape along the inside keeps it anchored against tights or bare legs, invisible from the outside.