Good Toronto Pubs with Patio?

Hi, I'm planning on celebrating my birthday at a pub with about 15-20 friends. I'm a university student, and most of my friends are too. Because of the nice weather lately, I'm looking for a pub that'll have enough room (in the patio area, or inside) for everyone and that's generally relaxed. Some pubs I like include the green room, (but more so the red room), and even the lab- just casual places. If you have any suggestions of chill pubs in toronto, especially with patios, please share!