HMSHost and Coke recently launched a check-in contest on foursquare that could net you a free trip, free Diet Coke for a year, or other prizes.
Their “Gateway to Adventure” campaign is fairly simple- go to this mobile landing page, enter your email, connect to foursquare, fill out a little contact info and then check in to a HMSHost Restaurant. You will then be entered for the drawing.
Good Luck!
