VISITING AUGUST 25-AUGUST 31

My name is Sherri.  I live in Dayton, Ohio.  My husband and I are visiting our daughter in Seattle August 25-31.  We will be staying in Ballard.  We love to play doubles.  We are on 2 8.0 mixed teams.  We are looking to play against two guys or to play mixed.  Any ideas on how we can set up some tennis?  Should we go and just hang out at the courts?  Which courts would you recommend?