After an electrical fire damaged its property in June of last year, West Side hole-in-the-wall Three Amigos Chinese Food finally began serving customers again Wednesday. Over its many years in business, the cafeteria-style dining spot at 303 NW 36th St. developed a devoted following for its pineapple chicken, generous portions and low prices. On any given day, a long line of customers would amass to wait for its doors to open.