You should take a look at tools like https://appear.in https://appear.in. They make it so easy to create ad-hoc conference rooms for people coming from differe

You should take a look at tools like https://appear.in https://appear.in. They make it so easy to create ad-hoc conference rooms for people coming from different mediums (for example, sales pitches with many people accross the world, organised in under a minute). These tools are great if you want to organise something like several people from Slack, Skype and email (customers).