When we hire a few new people I start a new round of Coffee Chat Bingo.
My python script takes all our employee headshots and makes everybody a unique bingo card (obviously excluding their own headshot). Then they bring their bingo card to our virtual weekly Coffee Chats and get to mark off somebody else who is there.
First person to get a row wins a small prize (coffee gift card) and then we usually have a second place as well (submarine shape gets a sub sandwich gift card) — after that enthusiasm starts to fall off. Helps the new people to get to meet more people than they would if there wasn’t a gameified incentive.