What are some things to do in Barcelona? Ibiza?

I want to party, have a blast, meet cool people, maybe hook up with some guys (I'm 23 yrl old female) go to bars and clubs, see some culture and sites, and go to the beach. Along those lines, Is Barcelona a good fit for that? and how is 6 days long enough to spend in Barcelona? and Whcih is better for that type of agenda, Spain or Italy? And waht about Ibiza, is that worth going to?? thanks!

ibiza is expensive!! but well worth it for partying, i heard barcelona is fun and that its a good place to party as well, 6 days is long enuff, greece is better than both spain and italy,

yes yes yes. barcelona is the fashion captial of spain... well that's what i heard from top model.... :D so shop... hha.