WarmShowers is a hospitality exchange network for cyclists. The website runs on Drupal. It's a US non profit with the 501(c)(3) charity status.
Warm Showers is based on a Drupal installation.
Donation & Volunteer Based
Warm Showers is donation based. All the registration and technical work is done by volunteers. Costs in 2009/2010 are about $600/year for hosting. Warm Showers received US$464 in donations in 2009 .