Though canines love tennis for its bouncy yellow balls, humans appreciate the freedom to bark loudly with each swing and bury their favorite rackets all over the court. Become a tennis beast with today's Groupon to Sutton East Tennis Club, located between 59th and 60th Streets, under the 59th Street Bridge. Choose between the following options:

• For $70, you get one hour of prime court time (up to a $188 value). Prime court times are Monday–Thursday from 6 p.m. to 10 p.m. and Saturday–Sunday from 9 a.m. to 5 p.m.
• For $45, you get one hour of non-prime court time (up to a $135 value). Non-prime court times are any time except from Monday–Thursday from 6 p.m. to 10 p.m. and Saturday–Sunday from 9 a.m. to 5 p.m.

With eight red-clay courts nestled inside a 45,000-square-foot air structure, the Sutton East Tennis Club provides racketeers with a first-rate facility for satisfying net-sport cravings. The gigantic indoor space provides forceful lobbers and power hitters with plenty of back-court space as well as ample protection from shot-disturbing gusts of wind, racket-denting hailstorms, and the mentally jarring heckles of snowmen. Use your 60-minute court rental to stage a friendly singles face-off against a coworker, or organize a doubles duel to reassert your dominance over the couple next door. The club is open from 7 a.m. to 11 p.m. every day, though it closes between May 2 and the week after Labor Day.