Icebreaker game
An icebreaker game is a short, low-pressure activity that helps people who do not know each other well relax and start talking.
Good icebreakers share a few traits. They are quick, they have no embarrassing losers, they do not ask anyone to share something private, and they give people a reason to talk to each other rather than only to the host. Classics include two truths and a lie, name games and simple would-you-rather questions.
Party games on phones are a natural fit because they take the pressure off. Nobody has to perform in front of the room: you type an answer or draw a quick sketch, and the screen does the reading out. Bluffing games work especially well, because making up a plausible lie is funny, and finding out which colleague writes the best fakes tells you something about them. Chaotic games where nobody takes the result seriously loosen a room up fast.
Pick something with a minute of setup, no experience required and no one-on-one pressure.
Boss's Bluff - a bluffing game that gets a mixed group laughing within a round.
How to host a game night - ideas for mixed groups who have just met.