Foursquare has dug into their data to find out which cities were most likely to put off their taxes to the last minute in 2011. These cities each saw a spike in check-ins at US Post Offices in the week before Tax Day last year:

1. Salt Lake City, UT
2. Columbus, OH
3. Indianapolis, IN
4. Richmond, VA
5. Bridgeport, CT
6. Akron, OH
7. Detroit, MI
8. Austin, TX
9. Boston, MA
10. Nashville, TN

Read more here: Using Foursquare to find tax procrastinators