Passeggiata - is basically a leisurely walk. It's typically in the evening but we're essentially just recommending a walk here. San Marino City is a walkable city, small, with plenty to admire, including 3 different castles. It's also located atop a mountain so the panorama is beautiful from this vantage point as well.
Super dive bar that sometimes has live music. The bar is built into a cave and you can hang out front. Cheap drinks and nice people. The guy in the picture is our friend Paz playing here. They're not always open. Check their Facebook page: https://www.facebook.com/coop.il.macello/