Anyone else with iPhone use foursquare app? # Just RSVP'd for a SXSW show. This will be my first year going. http://bit.ly/aolFxA # Dinner. (@ Chilli's Bar & Grill) http://4sq.com/d9dLrr # Sometimes you just need to tell the little voice in your head to stfu. # I don't care about the school closings. I want…