Welcome to Columbus!
For those of you who may be unfamiliar with the area, here are some recommendations.
Lodging:
The wedding is in Clintonville. AirBnB's in this area or Old North will be convenient. German Village and Victorian Village have beautiful older homes if you're feeling luxurious.
Things to do:
The Short North area is great for a night out, very walkable if staying in Victorian Village. Stop by Basi Italia or Rooh for an amazing dinner or check out some local bars (Mouton and Denmark make a good cocktail).
If you are in German Village, enjoy the local "Shakespeare in the Park" playing many evenings at Schiller Park. Or just wander around Schiller Park with your coffee from Stauf's after paying a visit to the Book Loft.
The gardens at Whetstone Park of Roses in Clintonville should be starting to bloom, the neighboring Pattycake Bakery has amazing vegan baked goods with GF options.
The Olentangy Trail runs N/S for about 16 miles, and is great for long walks/bike rides.