Gap fans who've noticed the latest ad campaigns (khakis a-go-go, anyone?) might think Khaki's is a good place to stock up on pants and shorts. But Boca Raton folks have long known Khaki's to be a great place to fill up on casual American fare, like enormous caesar salads topped with chicken; simple grilled meats and fishes; and terrific burgers, soups, and sandwiches. Now the folks from Khaki's have opened a second location called the Grille (5101 Congress Ave., Boca Raton, 561-912-9800). The two-week-old place offers the same quality as the first eatery, featuring steaks, chops, and pastas. So for diners who can't squeeze into the existing Khaki's, there's always the roomier Grille.