Some of these virtual worlds are simply amazing, but they do take a good deal of computer resources to run and space to install.
If you have hours of extra time on your hands you may find that these virtual realms are worth the time to learn.
If you are looking for something similar, but not quite as time and resource consuming, we will soon have some 2d avatar rooms in our flashy chat upgrade that will allow you to jump right into a room or two, have an avatar that can walk around the virtual bar and chat with other people's avatars.
You can expect the download and install to take some time, and then learning how to create your avatar, move around the world and interact with other people (and objects) has a bit of a learning curve, but once you get into you can become quite immersed in lots of different things to check and out enjoy.
You could end up spending a lot of time in the virtual worlds, so it's definitely not something to jump into if you are looking for a quickie!
When some people think of cybersex they think of these 3D animated rooms, or virtual worlds.