WordNet (r) 3.0 (2006):

gambling house
    n 1: a public building in which a variety of games of chance can
         be played (operated as a business) [syn: gambling house,
         gambling den, gambling hell, gaming house]

Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "gambling house":
   baths, betting house, betting parlor, casino, club, clubhouse,
   crib, flat, gambling den, gambling hall, gambling hell,
   gaming house, gathering place, hangout, haunt, health resort, hell,
   joint, meeting place, poolroom, purlieu, rallying point, resort,
   spa, sporting house, springs, stamping ground, watering place