Two maintenance workers push brooms over the tiered floor of the Ogden Theatre, piling ear plugs, weed capsules, a temporary tattoo and other detritus left over from rapper Playboi Carti’s concert there the night before. It’s an off day for the theater. On stage, a crew sets up backline equipment for a band to rehearse ahead of its show at Red Rocks later in the week. Owner Doug Kauffman has seen this behind-the-scenes dance many times before.