It is a pleasant song with a pleasant melody, and Jeannie's voice is likewise pleasant. Also, she has been flattering enough, effusive enough in her praise for Lestat to reward this with his attention in kind. His current fill of vodka untouched on the table.

Not because he doesn't want to drink it, but Louis has the hand he would need to do so easily, and has perhaps forgotten.

Then he thinks, I would like to dance to this, and as was always so when such a thought occurred to him, in a time and place long lost to them both, it's enough for Lestat to get to his feet, turn, use his held hand to try to invite Louis up with him. And it only occurs to him once he is doing so that he might be shot down with real protest instead of the fake protest he is still, even now, used to batting side, on account of how they aren't actually together anymore, and perhaps never will be.

Well, he is quite charming. A way about him, he has read. Tonight's way is a silly smile and visible mischief inherent in asking Louis for a turn about the nearby patch of floor by the table in which no one else is dancing.

Plus he has fire powers and can self-immolate if he has to.