Serving Dow's White Dry Port?

Question

A dinner party-- when is correct time to serve Dow's White Dry Port ?

1) Just after arrival while waiting for dinner to be served instead of sherry or as an alternative ?

2) Unlikely--during the meal and if so when ?

3) At the end of the meal as an alternative to a good red port? Is it suitable/acceptable when proposing a toast?

4) Serve when the guests have retired from the dining room to another room in the house?

Answer 1

1) Lightly chilled -as an alternative to Sherry

2) With a light soup - Gazpatcho etc.

3)No

4) No