You are out with friends. Half of you want to go bowling and the other half want to go to a movie. How will you make a fair decision about wether to go to a movie or go bowling using a fair coin and assuming that all of you want to go to either of the places together?
Using the fair coin one group could call heads while the other calls tails, whichever it lands on is where you’ll go. This would be a good decision as it’ll be at random and either way you’ll all be together and enjoy your time.