善于／不善于交际的人
someone who is good/bad at meeting new people and talking to them
You get to know lots of people at college if you're a good mixer. 如果你善于交际，在大学里会认识许多人。
Ben's a good mixer and loves a party.
He's a nice guy but he's not an especially good mixer.
Shall we invite Millie to the party? Is she a good mixer?
Her school report mentioned that she was a good mixer.
She's a very nice person but, alas, a bad mixer.
See also: mixer (SOCIALIZE)