General tourism links:
Historically a working-class immigrant neighbourhood, the Market packs all things international and offbeat into a handful of tiny city blocks. Cheese from Eastern Europe, Chinese vegetables, antiques, surplus goods, anarchist literature, and anything that could be remotely considered 'eclectic' can be found here, and cheaply to boot. All kinds of food establishments -- cafes, ethnic restaurants, street vendors -- proliferate here as well.
About 800m from the Hackathon location. Start out going west on Richmond; turn right to head north on Spadina. Go left on Dundas, then a right on Kensington will take you right into the middle of the Market. (directions)
There are many good choices here, but my personal favourite is Konnichi-wa, a small homestyle Japanese place. Great katsudon can be had here; the noodle dishes are supposed to be good as well. Inexpensive; most plates run $6-8.
...or, as everyone calls it, 'the AGO'. Hands down the best art gallery in Canada and one of the best in North America. http://www.ago.net/