Holiday tournament

[Karen]

My father is organising a 4 day holiday for 16 people. 8 ladies and 8 men. He wants to  group them so they play in fours 2 ladies and 2 men each day. ( four matches each day) how can they be organised so they don't play the same person twice.

[Ian Wakeling]

Have a look at the schedule here.  If you took the first four of these rounds, then each player would have 8 different opponents and 4 different partners.  There will be some overlap, as it is possible that a partner may be seen on another day as an opponent.  I have assumed you are playing mixed doubles, however the schedule will still be useful if all you need to do is define groups of 2 ladies and 2 men.