i'm planning on visiting barcelona, rome, venice and paris, is it a good idea to go there and book hostels or do it before hand. i leave in a week, which is why i'm asking. my budget is a big concern to me, but having a good time is more of a concern. i heard that it's best to follow crowds around and just see which hostel is the most lively by actually going there and taking your chances.
any thoughts???
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