Pulling out the keys and pocketing them, Sirius locked the bike easily with a charm and stepped up to take her arm. Blacks were taught proper manners, and though his mother would probably swear they never stuck, Sirius was able to pull them out of his pocket when he wanted, for however long that lasted.
"Yes, we shall," Sirius declared, "I've got one reserved." He wasn't going to make her wait for a table, after all. She had been in the hospital wing a lot, and while he hadn't asked about her health from Remus, Sirius didn't tend to try to make his dates worse for the wear in unpleasant ways.