From long time ago, Scoutlinks let Skolta Esperanto-Ligo have its chat channel in their website. Scoutlink is an international organisation that puts scouts/girl scouts in touch through internet, no matter in which world international organisation s/he belongs.
The chatrooms are organizated by sections, languages or interests. You can use the webchat or another softwares like IRC or TeamSpeak. For esperantists, you must go to https://webchat.scoutlink.net write your nickname and then type #esperanto to enter the chatroom. Not always you can find esperantists on it, but you can leave a message, and then someone will contact you. Help us to keep the chatroom #esperanto alive on Scoutlink