I have been going to Bob Clubs for almost 5 years now, and I can say its is worthwhile, I have had many thousands £ of new business from them, but I have also saved even more from who I have met.
There are various groups out there that do this, the one I am with, meets every 2 weeks, you pay a yearly membership fee plus your breakfast cost, which works out at around £600 for the year.
What can you get from it, well more business is the main reason to join, but a lot of people expect to join one week and by the end of the month, they want refferals galour.
This is not going to happen, and the reason is, you need to prove yourself, would you recommend someone to a friend or contact who might do a p poor job, would your refferal look kindly on you if you recommended someone and they where useless.
What you will find is some will give you small one-off jobs and if you do a good job, you get a testominal to this effect, this will convince the other members to praise you to their contacts.
You also need to turn up all the time, if you don't them how are you going to build up a relationship with the other members.
I am now at the stage that I am known by most of the Bob groups in my area, and I do get phone calls from third partys who have heard good things about me and my company.