This is where DAO shines. It is so much faster to run a loop adding records than calling a Insert Into multiple times.
Here is how:
Public Function PopulateBokings()
Dim rsBookings As DAO.Recordset
Dim NextDate As Date
Set rsBookings = CurrentDb.OpenRecordset("Select Top 1 * From Bookings")
NextDate = Me!StartDate.Value
While DateDiff("d", NextDate, Me!EndDate.Value) >= 0
If Weekday(NextDate, vbMonday) > 5 Then
' Skip Weekend.
Else
rsBookings.AddNew
rsBookings!ChildrenId.Value = Me!ChildrenId.Value
rsBookings!ClubsId.Value = Me!ClubId.Value
rsBookings!DateRequested.Value = NextDate
rsBookings.Update
End If
NextDate = DateAdd("d", 1, NextDate)
Wend
rsBookings.Close
Set rsBookings = Nothing
End Function
Paste the code into the code module of the form, adjust the field and control names to those of yours, and call the function from the Click event of a button.