SOmetimes if someone is there wait a little while. I know I have been alone and when I am I minimize and do other things and check back. Sometimes I find someone came in said hello and left before I checked back. I find that around 6 west coast time is best too.
if you go in and nobody is there, make sure you go to options and check 'chatroom sounds'...that way you can hear if someone comes in while you're not looking. i find that anytime after 9:00pm central is a good time to find someone in there. hope to see you in there soon.