Skype isn't just for calls. You can use it to chat as well. If you just want to set up a single chat, you just click on a person, and you click the blue chat tab and now you can have a single chat. Or, if you'd like to have a group chat, click on the person plus tab and you can add whoever you like. I'll add my friend. Click the add button, and now you're in a group chat. So now all three parties will be able to talk to each other. And that's how you set up a group chat and a chat while using Skype.