This is a bit different as it will require an actual stay in the hotel, not just grabbing a coffee in the lobby :/

"To tell you the SPG Better by the Night promotion just got better. Now you can earn 250 bonus Starpoints when you check in on foursquare during eligible stays at all 1,100 hotels and resorts through December 20, 2012. Be sure your SPG and foursquare accounts are linked at spg.com/socialcheckins and that you are registered for the promotion at spg.com/betterbythenight to earn your bonus Starpoints. It's that easy."

Source: http://www.spgpromos.com/foursquare/...UARE_PROMOTION