Class Afloat
Recreation, Travel, Specialty Travel, Adventure and Sports - Class Afloat. More than 2000 reasons to sail around the world in 300 days.
http://classafloat.com/
Adventure and Sports
Tennis in the USA, Europe, Africa, Asia, Australia, world-wide
Recreation, Travel, Specialty Travel, Adventure and Sports - Play Tennis world-wide. Resorts, camps, and courts in the United States, Europe, and worldwide.
https://www.usa-tennis.de/