Perhaps there is an official name for these, but team choosers is the best I could come up with for a quick post.
A group of us play a game related to Canasta called Hand & Foot, and often hold tournaments where we get 4 tables together and play for fun. Everyone brings some food, so it's never a bad time.
Anyway, we usually just write numbers on slips of paper and everyone draws for partners. I decided to bump it up a notch and create these. They went over quite well, everyone loved them. So I am presenting this more of an idea than a quality piece of work. It could easily be implemented in other games or competitions.
They are carved from pine. One of the other players makes trophies, I used that design to create the hand and foot pattern for the left half. All the straight edges I placed index marks on while carving and cut with a table saw afterward. Then I cut the two matching parts in two using a scroll saw.