This was probably the worst waitstaff that I have ever encountered. They mixed up food, drinks, weren't charging for checks, and when we actually could get a check, it was messed up.
The one bartender (who seemed heavily inebriated) actually came up to different members of the party and said, "This drink is on me, tip us well and we will treat you well."
Free drinks aside, that is one of the most unprofessional behaviors that I have ever seen in any restaurant establishment.