Not usually.
Chat rooms usually get blocked due to our network security policy. These sites are not specifically blocked because they are chat rooms but because typically they use different network ports and require additional software to be installed in order for them to work. Non-standard network ports and installation of software are not allowed on the APNK computers.
You might notice that instead of the chat room page loading that it will time out or just get "stuck".
Our security policy is configured to best protect the APNK Network and our customers from malicious activity caused by the introduction of malware and viruses.
See also
Is the internet filtered?Information on the internet filtering in place on our PCs and wifi.