For 14 years, Deluxe Limousine Service has worked hard to maintain its reputation as a class act. For weddings, owner Ed DerSarkis insists his chauffeurs wear tuxedos and white gloves. But even when taking clients to baseball games, concerts, casinos, proms or nights out, you won't find plastic cups in the Agawam-based service's stretch limos—drinks are always served in crystal.