There are a lot of alternative and mainstream party places, clubs and inns throughout Budapest, but there are some districts and streets which have become the centre of these popular clubs and restaurants. Party time in Budapest usually starts after 11 pm, clubs and discos are fairly empty before this time. However cafes are crowded in the early afternoon.
Liszt Ferenc tér is located next to Oktogon (4-6 tram and M1 metro station). The square is surrounded by sophisticated, high level and elegant restaurants and cafes. As spring comes and the weather is warm, all these places open up their big terraces outside, giving the whole square a Mediterranean style. There is free WIFI available in all restaurants and cafes.
Ráday utca located between Kálvin tér and Ferenc körút, along the whole street there are restaurants, cafes, confectioneries and galleries, and there is also the first and only Michelin-star restaurant of Budapest called Costes. The beginning of the street (next to Kálvin tér, can be reached with the M3 metro or with trams 47 or 49) is very lively, but approaching Ferenc körút it calms down. The street itself is less fancy than Liszt Ferenc tér, a lot more direct and also has a lot more cultural style.
The nature of Ráday kultucca (culture street) is not only made by the numerous galleries and contemporary event halls but also with the lots of cultural festivals held in Bakáts tér, which you can find at the end of the street. For further information visit http://www.kultucca.hu/. There are open terraces as spring arrives, giving it a real Mediterranean feeling. Most of the cafes give free WIFI access.