Twangy rock cover group OK Otter performed Friday night from the Bryce Jordan Center for THON 2021. The band’s set included classic, laidback rock songs that keep dancers in a good mood. It played for about an hour and delivered straight-up bops the whole set. The Philly and South Jersey-based band started out its set with a killer song choice, “All These Things That I’ve Done,” by The Killers. OK Otter’s jam band feel is just what late-night THON needs as the rest period nears. OK Otter kept putting on hit after hit with other classics such as The Band’s “Atlantic City,” Dave Matthews Band’s “Ants Marching,” and “Brown Eyed Girl” by Van Morrison.