I was at a client site today and was offered a the $.05 tour of the facility.  Besides being extremely cool (the client is a forge who makes parts for mining equipment and other heavy industries so it looks like 10-ton Legos being pounded out of pure metal!) I learned an invaluable amount of information from my tour-guide ranging from:  their business, competition, pricing, staffing, assets, market positioning, strengths and weaknesses, future plans, go-to-market strategy, corporate pains, and a 30-year history of the company.  You can’t buy information like that.  ALWAYS take the nickel tour!