Tim Hortons is starting to offer free wifi in their Canadian locations. From MobileSyrup.com:

You can now sit with your computer, tablet or smartphone and get yourself free internet. In a press release this morning Timmies states that over 2,000 locations have free Wi-Fi, and the rollout will expand to 90% of Canadian locations by September.

I live in the U.S. so this doesn’t apply to me. Even if it did, I still prefer coffee from McDonald’s, Starbucks and Panera’s—all of which offer free wifi today.