Barefoot Coffee Roasters.
The cafe offers Coffee Lab classes for free. Home espresso lessons, latte art and tastings. What's not to love. I quite enjoyed visiting their cafe, a nonchalant good dose of energy, the vibe and ambiance are great. Plenty of seating indoor and outdoor.
Hop on Caltrain and go (about 4 miles from the closest station).
Worth every mile south of San Francisco. All 50 of them.