There's a big difference between "would you like to go out for a drink?' and "I want to have sex with you". One poisons a working relationship, the other doesn't (if done with tact).

Basically, if you wouldn't do it in front of your mom, don't do it to a colleague.

It's not appropriate at work, full stop. HR will have to discipline if not fire you in order to limit their legal liability for this. They will certainly have to fire you if you continue doing it after being asked to stop. They could be on the hooks for a lot of money in a nearly-guaranteed workplace harassment lawsuit if they allow you to persist.

And anyway, if your intent is actually to get laid, then randomly asking people in professional environments is the worst way to do so. It's not even a good tactic in nightclubs, let alone in the workplace. So you're not actually accomplishing your intended goal; you're just harassing your female colleagues.

Good god man, ask people out for drinks first, don't just jump immediately to asking for sex! Did no one teach you how dating or hook-ups work?!

They were drunk, so probably not at work. Not saying it's right or wrong. But probably less wrong.

You could still easily get fired for it, and the dumb shit you do outside of the office to your co-workers will haunt you once you get back to the office. It's not Vegas rules.

Well, maybe if someone record it and put it on social media. Otherwise, I doubt it. Actually, even then I doubt it, I've never seen it happen. From the article, it does not look like they got fired.

I've seen it happen. There are plenty widely publicized instances of it happening, too.

Anyway I said "could", not "would". It depends on how coarse you are with it, how dogged you are in doing so despite being told no, how many different people you do it to, and of course if you're reported.

The overall point is, though, that it's not a good idea.