question answer chat systems

Are there any heavily used real-time-chat-based systems for getting questions answered that aren't exploited by robots?
Who is Participating?
Any specific topics form your questions?

I can ask any question about anything on city data dot com.
How heavily used, do you want?

I'm a member of many forums and specific questions get real time answers sent to me. And the people are not robots.

I guess you refer to some other type of system?
rtod2Author Commented:
As heavily used as possible I guess to make the responses quick?
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