1099 Form/ Tax Question

I apologize in advance if this is not the correct forum for the topic/questions. But alas here is my situation/questions.

I was shocked when I got home yesterday, and checked the mail, and I had gotten a 1099 form from winning '$2700' worth of 'promotions/high hands' while playing at Boston Billiards/Gate City last year.

I don't know how they got my social, and I don't understand why I was taxed on winnings that were never more than 500 dollars.

Did/has anyone else get a 1099 from them? What about anyone who played in any other poker rooms in the area Chasers, Encore etc? Is this standard in all other areas? How would they get my SS if I only gave them my ID?