Pathos: You should join tennis because you're gauranteed to make friends through tennis. The sport encourages interaction, communication and just plain fun.
Ethos: Scientists and doctors around the world point to tennis as one of the healthiest activities that you can participate in because it delivers overall physical, mental and emotional gains. It will add years to your life!
Logos: Tennis engages your mind and body at the same time, unlike a traditional workout at the gym. Because tennis players are more confident, healthier, less stressed and more socially interactive, they're just plain happier.