April, the Last R-month before September is going full throttle and our gorging on Dungeness crab and oysters, combined with the approaching swimsuit season lead us to search for a regular form of exercise. Being slackers, we know that even with a $60 a month membership, once the first week is up, we'll only hit the gym when our water boiler blows. So after contemplating joining a cheaper out-of-town YMCA to visit the Presidio YMCA as a guest, our thrifty mind saw the light at the University of San Francisco Koret Health and Recreation Center. ...