On the Treasure Coast, WOSN-97.1/Indian River Shores, "Ocean FM," is identified as a standards or nostalgia station on Wikipedia and Radio-Locator.com, but it hasn't really had that format for a while now. Although its website and Facebook pages give no indication of a change, the station has been identifying itself as a place for "light and refreshing favorites" for a couple of months now. Two vestiges of its standards days now appear to be gone from its Sunday evening schedule: Herb Oscar Anderson and Dick Robinson's "Standards By the Sea" (HOA passed away recently, but his nostalgia show was not replaced).
The playlist is AC, but mostly "light favorites" from the 60's and 70's, with many songs that might also be heard on an oldies station.
There has been a trend away from standards/nostalgia stations at least in some markets I follow. Besides WOSN, in New York, it seems that WHLI/Hempstead and WROW/Albany play little or nothing from that traditional format anymore (Sinatra, Tony Bennett, Ella Fitzgerald, Michael Buble, etc.).
In any case, WOSN should no longer be considered a standards station.