Sacramento is not lacking in pizza. With options like Chicago Fire, Pieces, recently opened Papi's Pizza, family-owned businesses like Zelda's and Luigi's, or wood or brick oven-cooked Italian pizza from Hot Italian or Masullo, it's hard to imagine the need for more pizza establishments. But on Monday, May 18, midtown residents will be treated to the opening of a California Pizza Kitchen on 16th and L, the 253rd incarnation of the restaurant. One of the most impressive reasons to dine at a CPK could be its extensive children's menu that was recently named "The Best Kids Menu in America" by Restaurant Hospitality Magazine. Located in The Firestone Building, it will be open Monday through