We're not performers, but we carry a half dozen "pickin stools" when we go out, since most portable chairs/seats have arms that get in the way. The ones we use are short "sit-down" ones, but the same style comes in a "bar length" about the height you want. Tube steel frame, and the "seat" folds down flat to make for pretty compact stowage. A nice feature on these is that the seat latches in place when you set them up, so they don't fold up with you on them.

The ones we use came from - dare I say it - Wally World, for about $10 (US) each. We got the wooden tops, since they're interchangeably useful as small camp tables; but they come at about the same price with padded seats. (Padded seats in camo cloth are common at "sporting goods" outlets here, in the short version.) I think the taller ones were something like $18 or so the last time I saw them.

Similar styles in all-wood construction are fairly common, but are usually significantly heavier to pack around. For the taller ones, if you give up foldability there doesn't seem to be much difference in what's at quite a few sellers.

John