Oh dear. I'm such a bad person.
In my younger days (probably not entirely legal yet, actually), I've cycled home when I've been too drunk to walk. It feels like flying!

It was only a couple of miles.
In my more recent uni days, everywhere was close enough to walk to on a night out. Of course, I have cycled next morning whilst still drunk. And only fallen off once.
These days I generally only have a couple of pints anyway. I feel too bad next day to really enjoy any more (and I'm a skinny runt, so it goes straight to my head). And yes, I will still cycle to the pub, and cycle back again too. Walking takes too long.
Actually, you can get a criminal record for being drunk in charge of a bike. But around here they generally only look for that if you're cycling in one of the villages around midnight, because it's pretty blatant that you've only cycled because you wanted to drink.
Ellie