I use voice tele-conference rooms all the time to talk with people on the web. Below is one I found recently that I dont even use, I just save them if I ever need one. I've not heard it being used ever. There is no charge for these things they are just a long-distance call and most people HAVE free long-distance these days anyway.
You call the number and you get put into a conference when other people dial-in you can just start talking with them. Like I said I've never heard anyone else on it. So if you wanna chat voice just call the number at the same time as others who you want to talk to, thats it.