Hand everyone a playing card as they come in. When you are ready to form your teams, call out a poker combination that they have to form a group with:e.g. if you want them in threes, call “Three of a Kind”; in fives, call “Full House” (three of a kind plus a pair) or “A flush” (five of the same suit).
You can have 2-4 rounds with questions to answer in their small groups (for examples, see Roll The Dice) or just use a combination that gives you the number of small groups you want (e.g. if you want four groups tell them to form groups of each suit; if you want groups of four people, call ‘four of a kind’ or ‘two pairs’.)