On the south side of Routes US 20 and NY 5, one-half mile west of the village of Waterloo, lies a family-owned hamburger stand. Many people have described this eating establishment as "a slice of Americana", "a bit of nostalgia", or "a sure sign summer is here". No wonder Mac's Drive-In has survived so long. Mac's offers that special touch no fast-food restaurant can bring -- superb, pleasant,...