When I worked at Mickey Ds I used to turn up in the morning really drunk from the nite before (usually 3 out of 5 weekdays).
One day I rocked up drunk for the morning shift (starts at 6am), I hadnt slept and I was still slurring my words and stumbling. My friends who Id been out with the nite before turned up and they were just as drunk and just as sleep deprived.
So when they offered me the opportunity to shotgun a beer in the McDonalds dining room, well, hot damn i took that opportunity and consequently lost my job.