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Ratskeller

British  
/ ˈraːtskɛlər /

noun

  1. the cellar of a town hall, esp one used as a beer hall or restaurant

  2. any similar establishment, esp in the US

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Ratskeller

German: from Rat ( haus ) town hall + Keller cellar