Help in finding the right theme- membership website



Hello… I am hoping somebody can recommend a theme for me. I am looking for a Wordpress theme that has membership plugin already built in. At the beginning the membership will be free of charge but in the future there would be possibility of paid membership,so I would like something that would be easy to transfer to. Also members should be able to post their own photos with description. So there should be a gallery made by members. This will be a theme for my client,so I would like few options that I could present to him.
Does anybody know a theme that would work for me?
I looked around but I didn’t find anything…
Thank you for any help.