If you loved sword fighting with tiny plastic spears as a little kid, you’ll get a kick out of the grown-up equivalent: fencing! Take an open-air lunch break and meet the instructors—all coaches fence at an Olympic or national level—who teach you the basics, such as how to attack, disengage and parry (block) before you dive into a blood-pumping duel with a partner. Don’t worry, the classes are noncompetitive, but you can still say “En garde!”