Sometimes the titles just write themselves. On Tuesday Virgin America and Loopt partnered to offer people two-for-one tickets to Cancun or Los Cabos from California. All you had to do was check in on Loopt at SFO, LAX or one of a variety of taco trucks in San Francisco and Los Angeles in a four hour window. So how did it go? Loopt says 1,300 people checked in to a single taco truck in San Francisco, and 80% of those people have already bought tickets on Virgin America for flights. It was Virgin's fifth highest revenue day ever, says Loopt (we're confirming with Virgin).