When Sirius finished, he jumped off the stage in his usual way. His boys were sitting with -- well, with the man James called his boy -- heading off any problems as to where to go. He gave James a friendly jostle in passing as Lily slipped into the seat at angles to him, and then continued on his way.
Gaius greeted him before he got there, with a quick kiss and a promise to return. In the midst of turning, Sirius jumped at a sudden swat to his arse, but then, watching the cocky walk with which Gaius departed, laughed softly.
"Hello," he said to Harry and Faelan, as he slipped into the chair between Harry and where Gaius would be. "Great to see you here."