Its puzzle time.

[Regular.Cyclist]

I am guessing 42 but am probably miles out.

Precisely half that number.

 

[Ming the Merciless]

I am guessing 42 but am probably miles out.
I base it on each person shakes the hand of 6 people. There are 7 people x 6 = 42
.

Miles out

 

[Ming the Merciless]

Well there are 7 people and they shake hands with everyone else
i.e. 6 people each

so 7 times 6

42

(anyone shouting 6 7 at this point should be reported to the Mods and banished to "The Other Place" for all time!!!!!)

Miles out

 

[Speicher]

6 + 5 + 4 + 3 + 2 + 1 = 21 hands shakes.

 

[classic33]

Seven ate nine mince pies?

And regretted it later