He was amused by Orsino's reaction. He figured it was best to warn him now to all the questions he planned on asking rather then let him find out and get annoyed when he started firing them off. And, should Orsino actually admit to having been up to anything, he'd know to expect questions pertaining to that. He thought that perhaps he should ambush all his friends at some point. It could prove to be amusing.
"Ah, warmth," he muttered, following along behind the hostess and looking around. Don didn't mind the wait they'd possibly have due to the number of people. It would definitely give them enough time to warm up and plenty of time for him to start in on some questions before the food got here. He definitely didn't want to prompt any talking with a mouth full of food.
"I think the hostess would love to give you a meal tip or two." He glanced toward where she was before looking back to Orsino. "Though I do admit it is tempting to order a number of things. Some of these sound really good."