The wedding will be in the Merrifield/Falls Church area that is about 30-35 minutes away from either Washington Dulles (IAD) or Washington National (DCA). You can take the DC Metro from either airport to near the hotels. The closest Metro stop is Dunn Loring/Merrifield on the Orange line. https://www.wmata.com/schedules/maps/wmata-system-map.cfm
The Archer is located right in the Mosaic District with a ton of cool shops, delicious restaurants, movie theater and a Target. (https://mosaicdistrict.com) Other nearby eateries include: Sweetwater Tavern - https://www.sweetwatertavern.pub/location/merrifield Silver Diner - https://www.silverdiner.com/merrifield Open Road - https://www.openroadgrill.com/location/merrifield/