Hey man,
If you're traveling alone - only go to dorms... so you can meet people.
I visited the same places on your list, and some more, but I'm doing it over a YEAR. You don't want to jump so much, you'll spend half of your time traveling in trains, in airports... if I were you, I would stay longer in each place, not just 2 days, but reduce the places I'd go to. But that's just ME, if you like jumping around like that then do it... if I were you - I'd go to these places:
Prague - for SURE #1 pulled 4 girls in 8 days here. I've been there a month and planning on going back there.
Berlin - go to Tresor and Bergain (clubs)
Krakow - Amazing place, student town
Stockholm, Goteborg - expensive, in Stockholm go to City backpackers hostel, ask to speak with SIVAN, tell her I sent you, she will tell you about the best parties (legal and illegal) Review:
http://vanofvictory.com/hostel-review-c ... lm-sweden/ . Goteborg go to a club called Exect .
I'd go to RIGA too (stay at The Naughty Squirrel hostel, one of the best in the world, review:
http://vanofvictory.com/hostel-review-n ... rrel-riga/ ) and a town called Kaunas, second-largest city in Lithuania.
I'd go to BUDAPEST (I lived there 5 years) and BUCHAREST (haven't been there but was told it's amazing)
I wouldn't do more than that in 43 days. Stockholm do 2 days. Warsaw you can skip, I hear POZNAN is great too. I'd also do Belgrade (haven't been there yet but also, was told its great)
That's 12-13 cities... it's already too much for 43 days. I've been in Berlin, Prague and Krakow a month each and I still don't feel it was enough!!!
What I gave you are the BEST cities.
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