Alright I am fairly sure that all of the ones have a dancing scene. To find the exact episode just type in "(anime) list of episodes" into Google, go to the Wikipedia page and then do a control find for "dance" "dancing" "party" things like that. Also the ones in bold are the ones I view as being more mainstream and recognizable.
Spice and Wolf
Eden of the East
Zero no Tsukaima
The World God Only Knows
Kono Naka ni Hitori, Imouto ga Iru!
Maoyuu Maou Yuusha
Zanz Bonus Points Tally
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