With a deck of cards perform exercises as drawn for each of the following:

Hearts = Push-ups
Diamonds = Sit ups
Clubs = Squats
Spades = Burpees

Numbered cards are done for reps as numbered
Face cards are 10 reps
Aces are 15 reps
Jokers = 400m run

As soon as 1/2 the class is done with the card - we move on!
Rx is awarded to those who do all reps