If you're downtown at lunch hour and the sun is shining but the wind is fierce, head to the public open space at Mission and Second Street. It's a three-story, glass-enclosed indoor plaza with an assortment of benches, tables, and chairs spread across two floors of seating space. There's even some art on the walls, in case you tire of the scenery on the street. The echoes won't drown out a quiet conversation, and it's an ideal place for a coffee break on a rainy day, a brown-bag lunch when it's too chilly to sit in the park, or an afternoon of reading without the wind whipping through the pages. No matter what the elements bring, you can people-watch in comfort.