I have not yet really got into online photo sharing, but I want to do so soon. What I would like is a service that allows me to define groups of people (e.g. friends, parents, family, work colleagues etc). Every time I create an album in the service, I want to then assign that album to one or more groups (e.g. friends + family group) so that only people I have in those groups will get notified that I have just uploaded a new album for them to view and people who are only in other groups (e.g. co-workers will not get notified and will not be able to see the album when they visit my page on the site). From what I understand about Google+ (which is very little), this is conceptually similar to the way it operates. But I also think I am right in saying that people will need to join google+ in order to receive updates when I publish new content. I do not want this. Are there photo sharing websites which operate in the way I have described that do not require visitors to join the site or join a social network?