WordNet (r) 3.0 (2006):

roadhouse
    n 1: an inn (usually outside city limits on a main road)
         providing meals and liquor and dancing and (sometimes)
         gambling

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "roadhouse":
   amusement park, ballroom, boardinghouse, cabaret, cafe chantant,
   cafe dansant, casino, dance floor, dance hall, dancing pavilion,
   dorm, dormitory, doss house, entertainment industry, fleabag,
   flophouse, fun-fair, guest house, hospice, hostel, hostelry, hotel,
   inn, juke joint, lodge, lodging house, night spot, nightclub,
   nitery, ordinary, pension, posada, pub, public, public house,
   resort, rooming house, show biz, show business, tavern, theater