If Franz Kafka had a favorite bar in New York, Bohemian Hall would be it — and not just because it used to be a Czech and Slovak social club (and still is the central gathering spot for Astoria’s Czech and Slovak community). A city unto itself, this massive, time-warped relic has all manner of side rooms and antechambers branching off from the main bar. Wander these labyrinths after you’ve polished off a few mugs of the Krusovice or the Staropramen, and you’ll have a whole new firsthand appreciation of the term Kafkaesque. The ample garden was made for balmy summer days, but the bar itself is inviting even in the dead of winter. Rockin’ Czech and Slovak festivals and concerts, however, are available only in season.