RO-Sheen,
I've attended a few of these and they are definately good for networking.
The old saying "it's not what you know but who you know", certainly rings true.
I've picked up several quotes, one commercial and three residential jobs from these, as well as meeting the guy who now does my books for me.
Though there's normally a lot of salespeople there trying to sell you products you don't really need - a few of the MD types who attend don't bother speaking or acknowleging when they know you are a W/C......
I recommend you attend one as a taster, if there's no business to be done, leave it a few months before going back.
Breakfast is normally pretty good too - But with the dark nights coming in I prefer to make an early start on the windows - no time for breakfast meetings.....