Don’t be disappointed if you don’t see more than two people reading at the same time. How do I know — I did a back-of-the-envelope calculation. Suppose that everyone is awake for 12 hours (I’m thinking of your dad here) and that the average reading time is 5 minutes. So there are 144 5-minute periods per day for a reader. The odds of two people choosing the same time are about 1/144!!! In fact, if you have six readers, the odds of two people reading at the same time are

1 - (144/144)*(143/144)*(142/144)*(141/144)*(140/144)*(139/144) = 0.10

For a similar situation see this article about the odds of any two people having the same birthday.

Auntie Ipswitch

PS I’d like to think I’m smart but then I remember I married your Uncle Chappaquiddick