Please do let us know If you think that there should be a separate room for your own city.
Mostly the in the main chat room before sending an online private message (PM) to him/her.
I use several different services depending on what I want to do and who I want to talk to.
AIM is great for keeping in touch with old friends, Meebo or e Buddy for signing on anywhere, and Skype for business interactions.
You should sign up for an account to participate in the conversation, as guests are usually banned from typing anything.