rathskeller
Concise Oxford English Dictionary © 2008 Oxford University Press:
rathskeller /ˈrɑːtsˌkɛlə/
▶noun US a beer hall or restaurant in a basement.
– origin early 20th cent.: from obs. Ger. (now Ratskeller), from Rathaus ‘town hall’ + Keller ‘cellar’.
'rathskeller' also found in these Oxford entries:

