Severus looked at the extended hand with suspicion. The reaction was not exactly what he'd imagined but the young man, Brian, had seemed to enjoy the 'soss' as well.

"I will consider a truce if you concede that there will be things on the menu at the restaurant that you do not care for," he said. "I would suggest that you do not order them and complain. I would also suggest that you don't complain about them being there."

If he did, then Snape had a word for that. He had many, actually, but not all of them were synonyms for 'stupid'.