Tinkerbell, I was at a wedding show a few years ago, it was raining outside and I went out into the lobby which was tiled. There was water on the tiled floor which I didnt see. I slipped and chipped a bone in my ankle and was in plaster for a few weeks. I was told to sue as there was no "Wet Floor" signs nor was there any attempt to dry the floor. They logged it in their accident book. I tried to sue on the advice of other people.....according to the company I phoned, I had no case as it was their word against mine and they told the company there was a sign there.....I can 100% tell you there wasn't a sign, or I wouldnt have wasted my time.
It may just be my luck...you may well be luckier, however the fact you had been drinking may not look good for you. Also did you report the accident to any of the staff and did they log it in the accident book?