Ivan ate before the party - he wanted to be sure of his control, for one thing, considering he'd be among his own cohort members and theoretically on good behavior.

In truth, he's mainly here on business. He's meant to find Réjean for some time, but events haven't been on his side. A party might serve the purpose. Of course, that won't prevent him from saying hello to other acquaintances or making some new ones, either.