"For you? Anything." Sirius smirked and then just ended up with his hands on Remus' hips, dancing slowly. Which did mean that others filled the dance floor again, now that there was less risk of them getting knocked over. Sirius looked at Remus, catching his eyes and his smirk softened to a smile. "There you go. Now you're having a good time."

As opposed to before, when he had just basically been pouting sullenly, clearly hating the world. He couldn't blame him, full moon was coming up. Still. Sirius always wanted to cheer him up.