Pub and Rathskeller

Pub noun - A place of business where alcoholic beverages are sold to be consumed on the premises.

Rathskeller and pub are semantically related In some cases you can use "Rathskeller" instead a noun "Pub".

Rathskeller noun - A tavern below street level featuring beer; originally a German restaurant in the basement of city hall.

Pub and rathskeller are semantically related in barroom topic. You can use "Pub" instead a noun "Rathskeller", if it concerns topics such as establishment serving alcohol.