Originally Posted by Shareholder
Nor I. It says "good for one time use" and I've never heard of using the same pass to enter more than one MLL on each leg of the trip. I would suggest using the YYZ lounge if you have a long connection time, rather than the YOW one, if you are only permitted to use the pass once. You can always use the new Servisair lounge at YOW for $14 by prebooking it online.
Enjoy your first ExecClass flight, and visit to a MLL. (Don't get hooked, or spoiled!)
When I use to use my AMEX to get into the MLL and would pay for a guest they would stamp the guests boarding pass. Clients of mind used this to enter the lounge in their connecting city. Don't know if this is still something they do.