Latin people take their dancing seriously. Whereas the typical American, if he can dance at all, will only know hip-hop MTV style grinding, Latin people have a wider repertoire of moves. Salsa. Tango. 1-2 step (not quite sure what that is). And a million other variations.
There are also set expectations for how men are to ask women to dance whereas in the States it's more of a free for all.
At the one club/bar I went to in Montevideo, grinding was eschewed in favor of circle dancing, solo dancing, or other local variations.
No dance is more elegant, sensual, or sexy than the Argentine tango. All other dances pale in comparison.