Plevna is a German-style Brewery Pub & Restaurant. It's not the cheapest place in Tampere but the food is really good and the beer is even better. Try Bockwurst or Plevna's Stir Fry if you are looking for an affordable and decently-sized meal (even the 'small' one is big enough for normal hunger).
Tampere has the biggest roofed market hall in Scandinavia. If you cannot find something related to food in the normal markets, this is your place to go. There is over 400m of service counters and it's open from Monday to Friday. I don't want to hear anyone complaining that Finland doesn't have good bread, or meat, or cheese, or whatever. If you say this, you just can't find it!
Traditional pork party in Huuma. Come to enjoy splendid company and eat as much pork as you want. Tickets are sold in Juvenes bookstore for a price of 10e. Normal party ticket without pork costs 3e. Eating will begin at 19:15, eaters should be there early.