This is basically Atlanta's version of Central Park.
Downtown Smyrna. Not far from the wedding venue. There are a couple of restaurants, bars, and hangout spots including Zucca Bar & Pizzeria, The Corner Taqueria, Atkins Park Tavern, Moe's Southwest Grill, Nothing Bundt Cakes, Vineyard Wine Market, Smyrna Village Bourbon & Cigar.
Quiana typically has to do a Target pickup every time she travels. In case you're the same, there's a Target nearby.
For the out-of-towners, Cobb Parkway is a main thoroughfare in the Smyrna/Atlanta area (very close to the venue and hotels) full of hotels, restaurants, and stores. It has a bit of everything.