Opt-In Dining Club

Ability to block spam to mobile phones
Tokyo Internet-based dining club connected restaurants with those who like to dine out
Needed database of promising customers
Used mobile phone peripheral – if user wanted to sign up, jab mobile into device – transferred phone number & e-mail address, other information
Service queried preferences, get coupons, find restaurants with cuisine of choice
Restaurants could issue coupons for slow times (in real-time)