I'm in Gaslamp at 4th and K just across from the Gaslamp Hilton.
For a free time, go to the top of the Marriott on 6th and K. Looks over into the ballpark and it's a free ultra lounge (i.e. firepit neon lights, and swanky people-you can get laid it if you work it right).
There's also street level bars on 5th between K and Market. Too many to choose from. I usually drunk walk with my wife and pick a spot.
Also, Yardhouse brewery on Broadway and 4th. At least 150 beers on tap and excellent food. Really, too many places to list and tons of friendly people.
Or....just give me a call! 619-241-5081. You'd be 3rd legging it with me and my wife but we can hang out and shoot the shyte! We're cooler than a polar bears' toenails.