Treasure Island has been advertising on Facebook and their website about BOGO rates. I was having trouble having the prices reflect, but assuming that they do during your stay this is a great deal. To claim the deal you just need to go to Treasure Islands Facebook page or use this link. This deal is good through August 2013 and has a 3-night minimum stay for Thursday arrivals and a 3-night maximum stay for Wednesday arrivals. The free night(s) is only good for the room rate, which means you need to cough up the $25 resort fee even on free nights.
Use this link, which will take you directly to Treasure Island’s website. Scroll down to the BOGO offer and click “Book Now” or call them directly. Make sure to use the promotional code MBBOGO.