Not every performance on the Avenue of the Arts requires a pre-theater extravaganza. Since the December 2001 opening of the Kimmel Center, simple restaurants serving mostly no-frills Italian pastas and quick main courses have sprung up in the neighborhood, to get you in and out before your show. Chic bistro Bliss, 220 S. Broad St. (tel. 215/731-1100), a block from the Kimmel Center, has a winning, eclectic menu with pasta, Asian, and grilled dishes. Right across from the Academy of Music, Estia, 1407 Locust St. (tel. 215/735-7700), specializes in Greek preparations of fish, with excellent octopus and plenty of bar seating, but a hefty price tag. You can also dine superbly at the bar at Pasion!, or take your chances with the Kimmel Center's own preconcert fare. My favorites for early-evening Italian fare are cozy La Viola, 253 S. 16t St. (tel. 215/735-8630), with its spinach gnocchi in pomodoro sauce and BYOB policy; and the affordable wines, squash-stuffed ravioli, and grilled salmon with basil at Ernesto's 1521 Café, 1521 Spruce St. (tel. 215/546-1521). Also nearby (although 19 floors up) is the Bellevue's elegant Nineteen, which offers both formal dining and a more casual cafe for a quick meal.