I think the last time I vomited due to drink was brandy-related. It was about 7 or 8 years ago - again after a Christmas bash (The Ritz, I think). The brandy and port stage of proceedings had gone on a very long time and I ended up consuming a frankly ridicules quantity of the stuff. I felt grand until, after leaving, I was lurching across Green Park mumbling and cursing and was taken unwell. I sat on a park bench as my legs had become unsteady, whereupon I proceeded copiously to deposit my stomach contents all over my shoes. I eventually squelched my way home with my shoes filled with puke and had to throw the things away. Pair of Barkers as well.