C# - Offset Latitude Slightly If Not Unique?

I have a bunch of events with their location being pulled from the db and I am doing the following:

List<Place> placeList = new List<Place>();
foreach (var item in eventsList)
{
bool coordinateExist= placeList.Where(x => x.latitude == item.Latitude && x.longitude == item.Longitude).Count()>0;
Place place;
if (coordinateExist)
place = new Place() { title = item.Title, latitude = item.Latitude+0.0001, longitude = item.Longitude};
else
place = new Place() { title = item.Title, latitude = item.Latitude, longitude = item.Longitude};
placeList.Add(place);
}

I have a slight issue though. If two locations have the exact same latitude and longitude I want to offset the latitude by the slightest amount (equiv to a few meters maybe?), and then add it to placeList. Hence I will have a list full of unique coordinates.

how can i achieve this nicely? The above works but not nice IMO