Did a quick metromix search for restaurant deals on Fridays. I would call the restaurant to confirm the deal before going. The search returned many, many more – this list is just a sampling in no particular order.
Grocery - $25 3-course 5pm-7pm Monday-Friday
Ai Sushi - $4 appetizers in the lounge 5-7pm Monday-Friday
Trattoria 10 - $12 all-you-can-eat buffet 5-730pm Monday-Friday
Nacional 27 - $30 3-course 530-615pm daily
May St. Market - $32 3-course dinner daily
Le Bouchon - $25 3-course dinner daily
La Sardine - $27.50 3-course dinner daily
C-House - $16 2-course lunch Monday-Friday
Adobo (wicker park) – $1 tacos, $3 appetizers 430-6pm Monday-Friday
Ben Pao - $11 lunch 1130-2pm Monday-Friday
Viand – $25 3-course dinner daily & ½ off bar food menu 3-7pm Monday-Friday
Sixteen - $32 3-course lunch 1130-230pm Monday-Friday
NoMI - $25 4-course lunch 1130-1pm Monday-Friday
NoMI - $48 3-course dinner 6-9pm daily
Lockwood - $38 3-course dinner 5pm daily
Sweets & Savories - $29 3-course dinner daily
Shaw’s – ½ price oysters at bat 4-6pm daily
Phil Stefani’s 437 Rush - $3-$10 bar bites menu 437-7pm Monday-Friday
Fonda del Mar - $40 4-course dinner daily
Sullivan’s Steakhouse - $29 3-course dinner 5-6pm daily
Bonsoiree Café - $45 4-course dinner Tuesday-Friday
Zocalo – ½ price appetizers in the bar 5-7pm Monday-Friday
Vong’s Thai Kitchen - $24.95 3-course family dinner daily
Erwin - $18 3-course dinner daily
One Sixtyblue - $10 fried cod & fries & $5 pizzas 530pm
RoPa - $17.95 3-course dinner daily
Nia Mediterranean - $25 3-course dinner 5-7pm daily