A latinum dance was part of a Ferengi wedding.
Ferengi will not discuss latinum dances with non-Ferengi, although it has been reckoned that it was a way for the groom to make profit from the ceremony. (ST reference: Celebrations)
Quark complained that there was no latinum dance during Rom and Leeta's wedding in 2373. (DS9 episode: "Call to Arms")