Well, Dayton has (if you only count the original big signals...not the move-ins), 4 class B's. (WHKO, WTUE, Mix (the former WDAO-FM) and Channel (The former WVUD). We were just "blessed" (and I use that term with a grin) that some radio owners way back when had the foresight to go for a bigger signal for their "local" small town stations, which, if you think about it, may have landlocked bigger signals out of C-town. Could that have been lack of foresight for Columbus in the early days of FM, even though WBNS-FM was one of the earliest FM stations in the country? It dates back to the days of Ed Armstrong and was once on, if memory serves me right 42 mhz?
Also a point to ponder - Richmond, Indiana has 2 class B signals. Go figure.