Hospitality Clubs

Couch Surfing
Network connecting travelers with locals offering accommodations and advice. Members can be vouched for by other members or verified by paying a fee. Includes information about the organization, searchable database, message board, and chat room.
http://www.couchsurfing.com

Friendship Force
Nonprofit cultural exchange organization promoting friendship and goodwill through a program of homestay exchanges since 1977.
http://www.friendshipforce.org

Global Freeloaders
Online community matching guests and hosts for accommodation exchange. Testimonials, FAQs, and a member database.
http://www.globalfreeloaders.com

Hospitality Club
Volunteer members offer free accommodation and travel help and leave comments in each others' profiles after the stay. Includes a forum, chat, and wiki travel guides.
http://www.hospitalityclub.org

Hospitality Exchange
Publishes a paper membership directory twice a year, there is a membership fee.
http://www.hospex.net

International Police Association
This organization includes a Hospitality Club for retired and active law enforcement officers.
http://www.ipa-usa.org

Lesbian & Gay Hospitality Exchange International
Network of lesbians and gay men from around the world who offer their hospitality to other members.
http://www.lghei.org

MeetURplanet
Community offering free membership to travellers and hosts. Includes city information, personal experiences and gallery.
http://www.meeturplanet.com/

Pasporta Servo
For people speaking Esperanto. There is a membership fee for those who don't offer hospitality themselves.
http://www.tejo.org/ps/

Place2Stay
Offers a worldwide network of private accommodations. Includes information about accommodations, a forum, FAQ and chat room.
http://www.place2stay.net

Servas International
Oldest hospitality exchange organization. Website includes a newsletter, FAQ and list of countries. There is a membership fee and new members are interviewed by Servas representatives.
http://www.servas.org/

Teachers Travel Web
Open to all educators. Site also includes home exchange listings.
http://www.teacherstravelweb.com

Warm Showers List
List of cyclists who offer their hospitality towards other touring cyclists.
http://www.rogergravel.com/wsl/vh_for_a.html

Welcome Traveller Network
Members pay a nominal fee for bed and breakfast when visiting other members. There are several interest groups.
http://www.welcometraveller.org

Women Welcome Women World Wide
For women only. Aims to foster international friendship by enabling women of different countries to visit one another. There is a membership fee.
http://www.womenwelcomewomen.org.uk