Hospitality Clubs

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

Warm Showers - List of cyclists who offer their hospitality towards other touring cyclists.
http://www.warmshowers.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

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/

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

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

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

CouchSurfing - A volunteer-based worldwide network connecting travelers with members of local communities, who offer free accommodation and/or advice. Includes information about the organization, searchable listing of members, discussion groups, community wiki, and chat room.
http://www.couchsurfing.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/

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

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

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

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

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

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