When Eric purchases the Styx tickets, the sign above the ticket counter is misspelled "TICKET OFFFICE".
Despite much of the premise of the show, Styx was immensely popular, especially among teens, in the late 1970s.
Eric would not have been the only person in the concert line.
At approximately 10:55 Jackie is seen holding a Krayzie Bone Hard Time Hustlin 12" Vinyl Single which was not released until 2001.
Donna would have been encouraged by WFPP to cover and report the Styx concert.