Over 500 restaurants are taking part as restaurant week celebrates its 18th year beginning Friday. The restaurants are located in 35 Chicago neighborhoods along with 56 suburban restaurants. One hundred three establishments are making their restaurant week debut and 158 are women or minority owned. The three course menus run 30 dollars for lunch and brunch and 45 or 60 dollars for dinner. Reservations can be made at eatitupchicago.com.