Kiwanis Tennis Center in Tempe has drop-in doubles every Tuesday and Thursday night from 5:30 until 9:30. There are always at least 8 players, with as many as 18 at times. None of the regulars use this site to rsvp. The cost is $4. You must be a 4.0 rated player or higher. You can arrive at any time but I wouldn't suggest coming later than 7, as the crowd tends to thin out around 7:30.
Please...4.0 or higher.