The free event runs from 5:00 p.m. to 9:00 p.m. on August 10.
The diner, which holds a car show every other Saturday, announced an impromptu car show Sunday night and raised nearly $400.
The restaurant is located at 7010 E. Broadway Blvd.
"All of the donations will be transferred directly to the City of El Paso Victims' Fund. Come by and enjoy some of the greatest classic cars in Tucson!" Little Anthony's Diner said.