Cool Bay Area seniors get their fingers snapping and their toes tapping at SFJazz’ s Spring Festival at venues around town. This season’s stars include RIcki Lee Jones, Tony Bennett, Latin virtuoso John Santos and the German nostalgia-meister Max Raabe. These events are supplemented by a variety of lectures and classes. All kinds of discounts are available occasionally including ones for geezers. Come summer there’s a lengthy schedule of outdoor musical events, many of them free.