Huh, I don't get it. AP rooms are not VIP only, you can enter them freely as NON-vip from what I can see at this very moment. As we speak I entered one and I don't have VIP.
Alright, but if you really are looking for games similar to IMVU there is for example, half life, zepeto and Avakin Life. These games are a bit more dead and way less sexual (except half life) but still give off that same 3D chill spot vibe. :>