I need help with a very important senior Euro-trip. The budget is really flexible (up to $10,000+) and we love to party in just about every way, so all advice-givers should keep that in mind. Looking to have an insane experience that takes complete advantage of the culture of every stop. Thanks to all who comment or critique.

P.S.
Like I said, we loves to kick it so any suggestions regarding extra-special night-life activities or favorite spots are very welcome with open arms.