STAFF PICK: Another Tucson tradition. Great burgers (seven variations), hot dogs (four types) and sandwiches (35 choices). But ice cream is what it's really all about. Always more than 31 flavors, from pickle and jalapeño to great fresh fruit non-sherbet like mango and peach. And Austin's has the best three-scoop milkshake probably west of the Mississippi, although we haven't checked Wyoming. The anchor ad line is "They even leave the shake can," backed up in a host of radio spots by the hokiest--but most appropriate--'50s soundtrack in town.