Let me explain...
The Floran are a relatively young race according to the brief bio posted upon their reveal. Since they are not inherently evil, some of them find themselves among other races, joining them in galactic exploration. Now then, when two of them walk into a club with an abundance of dancers, what do you think comes to mind?
Let me put it in another way. Given they're young age as a species, what's the only dance that they know.
With that question out in the open, I must apologize for this obscene Floran pornography.
And I believe in the buttdance. Again, I am very sorry.