What a the point of offering wifi for phones at a restaurant? Don't they already have service? Its not like an airport where you might be there for hours without something to occupy yourself with.
Many restaurants, in addition to the dinner crowd, also service a more business-oriented clientele during the day. Wifi might be more necessary for working lunches, which laptops/tablets instead of phones are necessary.
More seriously, I like lunch meetings. I'd rather get out of work and back to the family an hour earlier than spend it idling with co-workers.
And often times, there's really not a good place to meet. Why drive 10-15 minutes, find parking, etc. at the nearest mall when you can walk down the street to the nearest restaurant in 5 minutes? Plus, I'd never invite a potential client to a mall plaza, esp during the summer...
I'm not really against lunch meetings, what I'm against is setting shop (taking laptops outs, or reams and reams of paper) and taking a long lunch in a busy place. ;)