Have a couch to spare? Or leaving town and want to make a few extra dollars? There are millions of travellers on the hunt for unique accommodation. They're looking for a taste of local flavour and that's where you step in. In the space of five minutes you can be signed up to Airbnb, Couchsurfing or Gumtree and have your place listed, for no charge. It's a chance to make some money, or meet interesting people from far-flung corners of the world. Three regular users share their experiences and give tips for potential hosts.