There are several local, regional, national, and even international networking referral groups made up of business owners/leaders (i.e. - BNI, MasterMind, Rotary, Chamber of Commerce, etc.). Here is a link to a blog discussing ten of these: Top 10 Business Networking Groups You Should Join
Most of these groups only allow one person to represent their profession and expertise. BNI, for example, may allow more than one Realtor in a specific group so long as one is a Residential Broker, another is a Commercial Broker, and even a third that is only doing Property Management.
John Cooper - A great suggestion for anyone looking to expand their network for leads and other opportunities!
Never really considered business to business networking and will look at this. You are right on target - begins with trust!
John Cooper
Roseville, CA