With a good marketing strategy put into place, promoting a restaurant both online and offline can work together for success.  Online marketing through Twitter and Four Square can be virtual promotions and coupons based on real time to tourists.  Offline marketing can easily be directed to the online efforts – but targeting your audience, whether locals or tourists is the key here.  Locals can certainly generate enthusiasm for your venue by sharing with their own visitors and online friends.  Targeting offline promotions toward locals easily generates marketplace buzz for your menu and making it fun will make sure the word can spread.  The attached photo shows an offline promotion for a Canadian coffee shop in the heart of an indoor city market aimed at the local businesses and office workers who travel back and forth in an adjoining mall.  Happy marketing.  More offline marketing ideas here:  Link