Rita + Lucius
Lucius was dressed in a peacock print that matched Narcissa's gown in colour. It was elegant enough but wouldn't outshine his wife, because he knew better than to take the spotlight from her at this gala.
He spent his time making deals with people, finding new appointments on different boards, making money without working. He also was making sure that Regulus got on the boards he wanted, because Narcissa had asked him.
One person who people avoided because of her poisonous pen was Rita, but Lucius enjoyed flirting with danger. "Good evening, and congratulation on the scoop about Honeydukes. It's shameful that the Ministry is not as efficient as you are."