WOW! Talk about the memories. While you were in college, I was just a young junior high punk growing up in the same neighborhood you talk about. I no longer live in Grand Forks, but visit there several times a year from Wisconsin to see family and friends.
The businesses you describe are litterally in the same area I grew up. Piggly Wiggly is Hugo's and the bar across the street is Judy's. Also in that same area was a music store called Mother's Records. I spent many, many hours there getting my Motley Crue on. HAHA.
I remember rink dances fondly at the roller skating rink on Gateway Drive. We used to drink in the cemetary near there and stumble to the rink dances. Afterwards, we usually stumbled back down Gateway to Hardees or if we were lucky and had a ride, we'd go to the Pepper for some real food.
I remember fights in University Park after school at Valley Junior High, great hockey at the old Ralph, rivalies between Central and Red River, finding somebody to buy me beer (Thanks Doug!) on the weekends, going road tripping, heading to Maple Lake in the summer, Friday night races, Shangrila, freezing my ever-loving butt off walking around town, playing video games at the UND student union and attending rock concerts at the Hyslop Sports Center.
Concerning the Tomahawk Cafe, I actually worked there as a dishwasher in high school. I think my boss' name was Shamus (spelling). Big burly SOB that ya just didn't want to piss off.
Great town... greater people.