There is no CCP information regarding this right now, so the only thing we've got to go on is extrapolation.
Naming is one big thing that I personally go with in terms of using as a reference point for such things. It would make little sense, for example, if the Gallenteans had something called "samurai". Why? Because we know samurais are Japanese, and the Gallenteans do not resemble Japanese in anyway. Similarly, the Achuran names are Japanese-esque; we wouldn't expect them to have West African names.
http://en.wikipedia.org/wiki/Persian_dance#Styles This article here has many dance styles that we could associate with Amarr; look at the some of the names there, then compare it with the names we have of Amarrians. Take a look at the syllables there, too. If you type in "Sha" to solar system search, pretty much all the systems that come up are Amarrian (Shabura, Shajarleg, Shafrak, etc, about 18 in total). Similarly, about 8 systems come up for the "Kh" syllable that are Amarrian.
Sort of deviated about the specific point regarding "waltz", but in these areas where there is absolutely ZERO information regarding a certain RP topic, then I always found the best bet is to look at naming and aesthetic, and make the connections as such. For this, spurred my OOC "eh" at an Amarrian waltz and masquerade, the same way we would go "eh" at Caldari bhangra.
tl;dr - No PF regarding dance, only point of reference is naming habits IMO.