A brief history of hospitality exchange networks
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Servas is the oldest hospitality exchange organization. Setup in 1948 by Bob Luitweiler, it was originally called 'PeaceBuilders'. More info
Hospex was the first Internet based hospitality club, established back in 1992.
Specialized networks
Gig Swap Warm Showers Organic Farming[[1]]
References
More about hospitality networks.