Ahh, the old radio festival. Q101 was an alternative powerhouse in Chicago. For years the would put on their Jamboree festival, a day and multiple stages of some of the best acts.
Other festivals have taken the place of Q101 Jamboree, especially Lollapalooza, but those were some fun days baking in the sun.
(Photo from Q101 Jamboree, May 22, 1990.
The New Music World Theatre, Tinley Park, IL.)