The men of Dale are pikers when it comes to a good polka celebration dance. All they can do is bring out the tired, old Beer Barrel Polka. After they killed Smaug did they try something new? Oh no, they did the same old Beer Barrel Polka. After the Battle of the Five Armies? You guessed it, the Beer Barrel Polka.
The Gondorians are much more refined in their Polkatology (actually, before he fell in with Saruman, ole Grima Wormtongue could do a mean Polka). We have the Tirith Polka, the Isildur Polka (before the Ring got ahold of him he could Polka with the best of them, he was really quite pleasant to be around in the pre-Ring days), and everybody's favorite - The Numenorean Shuck and Jive.
-Kevin