You can do this workout anywhere you like and it actually works great as a group. Set up 4 objects in a diamond pattern, then designate which object is first base, second, third, and home. Next pick out 4 exercises that correspond with each base.   Here is an example: Baseball Workout    
Every time you go all the way around it counts as a run. Set a time limit and try to score as many "runs" as possible. You can go for 15 minutes, take a rest break, and then change the exercises up.
Perfect chance to teach grandma what a burpee is. It's the gift that keeps on giving.
If you are doing it as a group, try to outscore the other team or individual. You will be impressed with how much of a workout you can get in 15 minutes.