Who this is for When it’s time to party, the Fujifilm Instax Mini 90 Neo Classic is perfect for passing around. Photo: Erin Lodi The big draw of instant cameras is that they’re fun to use. A great conversation starter, an instant camera gives you an easy way to coax even the most camera-shy subjects into posing for a portrait. Add to that the fact that you can’t share these images on Facebook at…