wife 40 Th birthday
It would be good to know what part of town (or even what city - this is an Ontario board after all) and your budget - but here are a few options -
Beer Bistro, as stated previously - can do a cocktail reception for 50
Sopra - cocktail reception up to 50
Auberge du Pommier -
i had my engagement party at beer bistro on king - right on the subway line, with a lovely patio - it's a great space. we had 50 for cocktails and it was full, but great. they did a bunch of yummy yummy apps like mini burgeers, pizzas, meat skewers, pigs in blankets, etc. we had food leftover so it was pricey but they didn't charge to book the room, which a lot of other places too. their website is pretty good for an idea of prices.