You can keep your sandy beaches and squeaky hard courts; for our money, the best volleyball is played on grass — shirtless and shoeless, in the sun — where you're still able to run and jump (unlike on the beach, where even decently athletic players are rendered virtual invalids). There are plenty of places to play, but none is more convenient or idyllic than Washington Park. On nice days, the park's grass becomes a sea of fluorescent nets and flying bodies, with several matches going at once. And for those who like structure, there's some method to the madness: Games are often organized beforehand, at http://volleyball.meetup.com.