Listen up Foursquare fans! The next time you are out and about, looking for something to eat, swing by your local Chili’s restaurant and check-in. Participating locations are now offering up free Chips & Salsa when guests check in using Foursquare. We have heard of coffee shops throwing mayors a bone for checking in, but this is the first time a national casual dining chain has embraced the location-based, social networking phenomenon. Hurry – This is for a limited time only!