The tracklist for performances under the Summer Night banner typically draws from Mingus’s book of "greatest hits," but the treatment is what distinguishes the night. Standards like "Goodbye Pork Pie Hat" or "Fables of Faubus" are reimagined.
It seems you're asking for the of the track “A Summer Night” by Charles Mingus — likely the recording from the album Mingus Ah Um (1959), though the exact title there is “A Foggy Day (In San Francisco Town)” — or possibly the composition sometimes titled “A Summer Night” from other Mingus sessions. Charles Mingus - Charles Mingus- A Summer Night...
"Osmotin'", "Portrait", "Duke's Choice (aka Don't Come Back)", and "Peggy's Blue Skylight". "Weird Nightmare" and "Eclipse": The tracklist for performances under the Summer Night