This place is located right off of Spadina, as one enters Kensington market. I came here with a friend who's a medical resident, and who claims to have learned most of what he knows about medicine within the walls of this café.
It's easy to see why - there's a cozy back room, the prices are student friendly (really reasonable for a good cup of coffee), and the eavesdropping is fantastic. Always an eclectic crowd here, and invariably someone up to something interesting.
They also take credit card without a minimum. Highly recommended.