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it depends what you like. addictinggames.com teennick.com girlsgogames.com (for girls obviously) fungames.com i like these sites but there not chat rooms or virtual worlds. hope i helped.
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as far as i know no. all chat or virtual sites require a user name and password. sry!
there is a chat site called cleverbot. google it.
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I dont fully understand what the question is, but a list of virtual world sites would include Subeta, a newer one called Menewsha, Sylfe, similar sites but with pets like Neopets, Marapets, Powerpets, or even simply dating virtual sites, like IMVU, which requires downloading of the actual game.
There are a lot of different chat sites that you can visit. A few of them are chat-connection.com, spinchat.com, chatous.com and there are many more like them.
Freewebs.com does not have a chat box, but you can get your own chat box at meebo.com or other sites like that and paste the embed code into Freewebs.
There is Fantage.com it is so cool!!! You can pick yiur chat settings like No Chat,Safe Chat,and Fantage Chat. So hope u like the website.
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Meeting new people by randomizing chat partners.