Re: Aggie here, visiting Columbia next week
Tio's Mexican is on Sumter near Pendleton and right across from the Horseshoe. Mellow Mushroom has good beer and pizza on Gervais in the Vista. A surprisingly good ramen noodle joint in same area of Gervais is the Mankoi... very tasty and good lunch prices.
California Dreaming has great steaks and seafood and the best salad with a croissant in the state!