Although they are usually thought of as a commuter carrier, the Long Island Rail Road (LIRR) offered reserved seat extra fare parlor car service on their longest distance trains between New York City and the east end of Long Island, until the end of the twentieth century. New York to The Hamptons and Montauk on the Montauk Branch; New York to Greenport on the main line. The focus of the service was summertime, usually Thursdays through Mondays, to provide a first class trip from New York City to the rural east end of Long island, and return.
In the years through 1968, this was done using a fleet of former Pullman heavyweight parlor cars, known as The Blue Ribbon Fleet. In the mid 1960s era, The Cannonball operated with 14 heavyweight parlor cars trailed by a heavyweight open platform observation car.
In the 1969-1975 era, the service was provided using a colorful assortment of lightweight sleepers, bedroom lounge cars, and tavern lounge cars acquired from B&O, DL&W, FEC, KCS, PRR, NH and UP.
In the final years, 1976-2000, the service was provided using a fleet of parlor cars with 2 & 1 seating and bars, referred to as The Sunrise Fleet, which was rebuilt by LIRR from their former MU electric coaches.
More info, roster and photos are available at
http://www.dominionrailvoyages.com/jhd/lirr