Sirius + Remus Who is Totally Awesome
Remus hasn't known if he was going to go to Harry's party. He'd had his gift sent in, in case he decided not to. In the end, Remus had resolved to go, if only to see who else would be in attendance - as well as the birthday boy himself. Remus had seen Harry around the island of course, but never for an extended period of time, had never spoken to him... And it was his birthday. What kind of parents' friend would he be if he didn't go?
For a while, he'd nervously stood around, looking at everyone else talk amongst themselves, not knowing anyone well enough to approach them. But then he had spotted Sirius.
"What's the umbrella for? Afraid it's going to rain in your drink?" Remus asked as he slowly slid onto another chair at Sirius's table.