A social networking tool for travelers to use while voyaging on the cheap. Done alone, in pairs, or in groups, couchsurfing can be done in over 250 countries with more than 2,000,000 couchsurfers worldwide. Popularized by its website, all that's required is to simply create a profile and request or offer a couch. Costs nothing but the memories and experiences are priceless.
Never sleep with your couchsurfing host...especially if he offers you alcohol.