Wheaton-Warrenville South High School:	682-2131
Northwest corner of Butterfield Road and Herrick Road/Wiesbrook Road in
Warrenville, turn into parking lot on west side of Weisbrook Road.
Six good courts, but watch for flying baseballs.  During fall school
season, courts may not be available on Tuesdays and Thursdays due to
team match play.

Source: http://www.dupagetennis.org/courts.html