You can find several pubs, bars, and cultural events in Budapest.
Szimpla kert 
One of the best bars in the world is Szimpla kert ruin pub. You find it in Kazinczy u. 14., along M3 metro line 550 m farv from Astoria Metro Station. It has a very special atmosphere that you will surely enjoy.
More info: www.szimpla.eu
Artemovszk38 – A38 Ship
Another exceptional bar with concerts, exhibitions and other events is A38 Ship at the bank of Danube. You get there by M3 metro till Corvin-negyed then by tram 4 or tram 6 till Petőfi híd budai hídfő (30 minutes).
More info: www.a38.hu/en/