If you are in San Diego, the staff at the San Diego Marriott Gaslamp Quarter can set you up with a tour of Petco Park, which is literally right across the street. It is incredibly cool. There's nothing like the view from a major League dugout.
In this area you will find great restaurants, Horton Plaza, (a shopping mall), & a multitude of shops within walking distance. There is bus service & trolley from the ballpark. Seaport Village is nearby. Food in the park is really good, especially the fish tacos!