Hi Pat,
in the past, I used to use the java chat applet from Volano (not on escorting websites). I found it very good and user friendly. The software is sold at a starting price of 500 USD (is it cheap or expensive?) and can be installed on any website. This is the link:
VolanoChat: Java chat server software used by thousands of websites worldwide!
Hope this helps.
Best regards,
Lino