"The Interval is one of SF’s more unusual bars, and will instantly impress anyone you take simply by showing them you know it exists. This all-day spot has kind of a coffee shop vibe that combines the offices of a chemistry professor and a Mission start-up. Instead of tea and coffee though, they serve a long and impressive list of cocktails. It’s a good spot for a solo drink, or for a small group after you “exercised” by walking around the Presidio." - will kamensky, nic strain 2