Ok, since no-ones gonna make suggestions Ill do it...
Date: June the 21st (Saturday)
Location: Scheveningen (Beach)
(This is easy to get to by public transport, also parking can be solved)
Time: 13:00 until we get sick of it
or the beer knocks us out
As the weather (nearly always) is nice in June we might as well meet on the beach this year

Have a few beers on terraces and kick some balls on the beach, and have a few swims when its too hot
If anyone has a better idea, let me know.
Its 25 degrees here now so Im off to test the water already!!