A fast get-to-know game that can be tailored according to the participants age/profession/etc.
Find things in common, talk to everyone in the group
Divide large group into smaller groups. Instruct each group to find 5-10 (depending on the time frame) things they all have in common. Challenge them to think creatively; places they have traveled, TV show they have watched, some other experience. The first group to come up with the designated number of things wins, points for creativity too!