It can be hard to find a place to eat near Piazza di Spagna without spending outrageous sums, but Al 34 has been an affordable standby for many years. There are two seatings for dinner, at 7:30 and 9:30, and diners can choose from set menus featuring Roman specialties, seafood, and meat, or else order from the large à la carte menu. Reservations essential. Jacket and tie.