CouchSurfing

I normally stay in the best hotels when I travel with my clients and in good hotels when I travel for my clients.

On a few occasions I have used the CouchSurfing website. I had good experiences with this.

About CouchSurfing:
CouchSurfing is an international non-profit network that connects travelers with locals in over 230 countries and territories around the world. Since 2004, members have been using our system to come together for cultural exchange, friendship, and learning experiences. Today, over a million people who might otherwise never meet are able to share hospitality and cultural understanding.

http://www.couchsurfing.org