There's no pub sign – turn the handle on the massive wooden door marked Kolowratský Palác, enter the red-carpeted lobby, and go down the stairs in the far left corner. This smoky cellar bar is a bit of a secret among the theatre community, but it is fun and friendly with beers (35Kč) and occasional live music.
It's connected to the Estates Theatre by an underground tunnel, and during performances you might see ballerinas at the bar grabbing a quick Becherovka and cigarette between acts.