Books in the A San Francisco Cozy Murder Mystery series

The Fog Ladies are at it again, spunky senior sleuths and an overstressed young medical resident solving murders from their elegant apartment building in San Francisco. They join a senior dating group, and romantic intrigue soon turns to murder. Graham Parselle, lady killer extraordinaire, plunges off a cliff on a Senior Singles outing. Did one of his dates pitch him over? Or is Olivia Honeycut's new beau to blame?