Still O.G.’s bar, with its on-tap cocktails, wood paneled walls, cubby holes packed with records, DJ booth and state of the art sound system, has a warm, inviting hipster feel. But if you’re in the know, you can slip past the back-of-the-room gatekeeper and enter Alter Ego, a spot that seems miles away from downtown San Jose and more akin to a high-class speakeasy straight out of 1930s San Francisco.