Why salad chains have popped up all over US cities

Sweetgreen and Chopt have transformed salad from a side dish to a $12 meal.
Salad chains are everywhere in big cities, but these salads are expensive.
At an average price of over $10, salad is becoming unaffordable for a lot of people
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Editors note: To clarify, at 5:51, we state that the average price at Chopt and Just Salad is over $10. In this instance, we are referring specifically to the salad menu items.Following is a transcript of the vid