Romantic and classy are in pretty short supply in the immediate Yonge/Dundas area. Maybe something on Elm St? Oro is fairly upscale, but more of a restaurant than a drinking place. Queen & Beaver is an upscale pub but still a pub and not romantic. You might need to branch out geographically a bit further to broaden your choices...
45 Elm, Toronto, ON M4W1N6, CA
Agree with Gary... romantic and classy are not readily found in that nabe. Q&B came to mind for me too. The downstairs bar is quite pretty and the cocktails are well made (it's perfect weather for a Pimm's Cup!)
- there is a small bar at the Pantages Hotel on Victoria, but I don't think it's particularly special
-how is the bar at Barberien's?
PS - How did your Victoria Day date go, Wilson?