For a bit of "german" ambience, check out the music of IFA Wartburg, Dschingis Kahn, Nina Hagen.
Eurovision Song Contest is always entertaining, look at the 2005 videos here:
http://www.bbc.co.uk/mediaselector/c...bram=1&bbram=1 (The Greek and Macedonian songs are both big hits this summer, the Ukranian was the theme song of the orange revolution. The Croatian was my favourite.

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It's probably hard to find any ESC CD's in Americaland though.
If it's possible, may I suggest setting up both a dance floor with Eurodisco and Ibiza Club Hits vol. 8 playing, with platforms for go go dancers and smoke and flashing strobe lights and all that stuff and a soft lounge with the wine bar, sofas to relax in, with Edith Piaf, Marlene Dietrich and soft jazz. (Or really strange electronica) Candles in wine bottles and artsy posters on the wall.
Oh, and.... GLOWSTICKS! YAY!