Here's an amazing way for a Top 40, or CHR to boost the luch hour through the roof. Take your lunch hour and call it the Old School Lunch. Play nothing but requests for the 80's. This is a great way to boost that 25-35 demo range.
We run this show on a station and it took a normally drab noon hour and made it one of the stations biggest features. The show started to dry out after a few months so we instituted the "Blue Plate Special". The Blue Plate takes and focuses the requests on a specific topic. Topics like, hair bands, songs with a color in the title, girl groups, songs to do with religion.
Of course to see the dollar side to it, get a sponsor for the hour. Give away free lunches and lots of everything else you can spare out of the prize closet.
We also found that the show is a huge hit in the office, so if you have a fax machine to use for requests, USE IT!! If not, get one. The doctors offices in town and a couple of factory offices send long lists of songs each day to the Blue Plate, so it cuts down on research!