Special venue for Sunday cocktail party - Toronto
Woo! I can read. Sorry DEF2323, I missed the "in January" part.
Place with a view and money isn't an issue... "good location" is nebulous, so I'll just start naming places. You'll have to call them all of course - not sure who can do an afternoon and/or Sunday.
Canoe - Though I'm not sure if they'd do a small party in the afternoon. Good view. Contact them.
Scaramouche - Same as above.
Red's - Has a lovely room overlooking the street that would probably do 20. Food should be satisfactory.
Gardiner Museum - You'll have to see about availability, but this is a great space. Catered by JK Kitchens.
Frank @AGO - interesting space, less of a view. Don't know if you could book an area off.
C5 at the ROM - decent view.
There are more places I'm sure, but less with a view, I'd think.