There is a huge range in the quality of iced tea you can get at any given restaurant. For the most part, restaurant iced tea can be divided into two categories: either freshly brewed tea or instant tea made from a mix or concentrate. For a in depth look at how to distinguish between these two click here.
Here is my take on the iced tea served at a number of different restaurants and venues (in alphabetical order). Click on the name for a full review. In addition to the review, each are rated on a scale of 1-5 or
to 
which is based on taste, consistency, ingredients and value.
A B C D E F G H I J K M P R S T U W Y
A
AMC Dine-In Theatres 
Applebees’s
AT&T Park in San Francisco
B
Baja Fresh
Beach Hut Deli 
BJ’s Restaurant and Brewhouse
Blast 825 Pizza 
Blaze Pizza
Bluestone Lane Coffee Shops 
Boston Market
Burgers & Brew
Burger Boss 
Burger King 
Burger Lounge
C
Cafe Rio Mexican Grill
Carl’s Jr. 
Cheesecake Factory
Chick-fil-A
Chili’s
Chipotle
Chuck E. Cheese’s
Chronic Tacos
The Coffee Bean & Tea Leaf
Colorado Grill
Corner Bakery Cafe
The Counter Custom Burgers
The Crack Shack
D
Daily Grill
Del Taco
Dickey’s Barbecue Pit
Dunkin’ Donuts
Dutch Brother’s 
E
Earl of Sandwich
Eatsa
El Pollo Loco
F
Firehouse Subs
Five Guys
Fleming’s
G
H
Habit Burger Grill 
Hodad’s
Hooters
I
Ike’s Love & Sandwiches
illy Caffe
In-n-Out
Islands Restaurant
J
Jack in the Box
Jack’s Urban Eats
Jersey Mike’s Subs
Jimmy John’s
K
L
M
McDonalds 
Moe’s Southwest Grill
O
P
Panda Express 
Panera Bread
Peet’s Coffee & Tea
PCH Grill in Disneyland
Pieology 
The Plant Cafe 
Popeyes Louisiana Kitchen
R
Raising Cane’s Chicken Fingers
Red Robin
Roam Artisan Burgers
Ruth’s Chris
Rubio’s Coastal Grill
S
Shake Shack
Smashburger
Specialty’s Cafe & Bakery
Starbucks
Steak ‘n Shake
Subway
Super Duper Burger
T
Taco Bell
Tender Greens
TGI Friday’s
U
W
Wahoo’s Fish Taco
Wendy’s
Which Wich 
Y
Iced Tea Lover 