Re: Attendance
Remus would have been interested in hearing about the spy work because he'd done covert missions while in the Order, so I feel like he'd be super interested in general? He might ask questions if it comes up as a topic. Otherwise, he'd be polite and introduce himself; but he isn't knowledgeable in poker or cars :(
Eliot would have been sure to talk to her and been charismatic because he's a chatter box. He'll talk about whatever.
Alice is being fairly quiet but she'd have talked to Gaby if the opportunity arose. She probably complimented her dress.