Wouldn't work in ATL for anything except AC. Peach used to be synonymous with Beautiful Music back in the day--people used Peach interchangeably with Muzak to describe BM.
Peach was the last BM station to flip, after WKLS, WLTA (99.7) and WSB-FM did. WKLS flipped in 1974, WLTA in the early 80s, and WSB shortly after that. Peach was still BM at least as late as 1985. I bet the folks at Susquehanna and Cox hated their stations called "Peach", especially in Arbitron.
You could use it for some kind of "adult standards/classic vocalists" format (don't get started, BizListener
Cox used this stereotype to their benefit, in a TV spot for B98.5 that showed a guy snoozing to a radio with peaches coming out of the speaker.