It's like some higher power knows we're on the second day of Cheap Eats Week. Word coming out of Danny Meyer's Shake Shack is that you can score their milkshakes for a measly $2, and doing so will help out a charity. Visitors to the Shack (excluding the locations in stadiums and other countries) who donate $2 to Share Our Strength's No Kid Hungry Campaign can get a free shake on their next visit. Those are valued at $5, so this is a pretty sweet deal. The promotion, dubbed the Great American Shake Sale, runs for the entire month of May, so the cheap food will live on!