Another reflection I had after looking at the professional theater company program from 30 years ago: It would be unusual to see ads for three radio stations in one program today. The program I've been looking at from 1990 includes ads for a former soft rock station, KRJY, wishing the performers a great 1990 season and advising them to "break a leg," KFUO, the former Classical music station, offering "Bach around the clock," and NPR affiliate KWMU, which, at the time, played "the best jazz performers from five decades, seven nights a week."
Aside from bumper stickers for the contemporary Christian station, KLJY, and the occasional KSHE or KDHX bumper sticker, I don't see much advertising for local radio stations today. Given my longtime affinity for radio, it's comforting to remember a time when three stations with different formats would buy full page ads supporting a local cultural institution.