We use Gramdominator (although we are looking at Jarvee now). We run Follow Campaigns targeting accounts that contain photos with our target geocode. Geo codes can be pulled from here: https://www.instagram.com/explore/locations/212947533/atlanta-georgia/. Just type in your target location, and pull the geocode from the url. In this instance for Atlanta, the geocode is 212947533. In Gramdominator, we can target by location, type in the geocode, and run the campaign. In our example of Atlanta, you could find NUMEROUS geocodes: find codes for major attractions, restaurants, universities, etc. All depending on your niche. It was proven very effective for our SMB regional accounts. ALSO, find a popular account within your target geo, and do a follow campaign targeting that accounts followers.