Price: 0$ (kind of)
Location: Multiple
This idea is kind of a cheat for PoorMan's weekend because it requires a membership. However, if you become a regular, you end up paying for the membership. Costco always has free samples and tons of them. Just come in during lunch time and walk up and down a few times and you should be set. If you are still hungry you can alway hit up the $2 pizza or $1.50 enormous hotdog. To make it a little more fun, try and figure out who the "regulars" are.
Cheap and fun things to do around Minneapolis/St.Paul