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Since a mobile is a phone and lunch counter explains itself by being a type of calorie counter; it is a mobile calorie counter for lunch.
Four students organized a sit in at a lunch counter in Greensboro, NC.
The success of the lunch counter sit-ins led to the Freedom Rides in 1961.
Rushing the Lunch Counter - 1915 was released on:
USA: 11 May 1915
what happened at the lunch counter sit with martin luther king