Almost every radio station in the area has some way of interacting with people in their local listening audience, either through call-in shows, sponsorships, interview shows, or events listings and promotions. Here's a list of them, starting at the far left of the dial on each of FM and AM.
FM
WCBN, 88.3 FM
WCBN: Events Info Listings: eventsinfo@wcbn.org. More info on their contact page
WCBN is student run and is always recruiting student DJs.
WEMU, 89.1 FM
WEMU calls their segment the "Datebook"
- "Are interesting arts events happening in your area? Promote them here on Public Events and get the attention your events deserve. It's free and easy!"
WUOM, 91.7 FM
Michigan Radio uses a similar system for collecting arts events: event calendar
WDET
WDET: Looks like you have to underwrite an event promotion: WDET events page
AM
WLBY 1270
Please contact Lucy Ann Lance regarding bookings for both the “Lucy Ann Lance Business Insider” and “The Lucy Ann Lance Show”