I've never gone to work "SMAAAAAAAAAAAAAAASHED" but I've gone in fucked up.
I've gone in right after a rave, no sleep, lots of E and K. Needless to say, I was a zombie that day.
I've gone in on a light K high. No problems there.
I've gone in while tweaking, and did more in the washroom. Easy day (minus the extreme boner I'd get everytime I saw my supervisor (sexiest girl i've ever seen)) and some days I'd be awake from the previous day still, so I'd start to get minor hallucinations (more like little squiggles n lines n smoke), so that was interesting.
And there's been SO, MANY, TIMES that I've gone into work blazed. And, I mean ALL levels of being blazed. Meaning, just one bowl to be all giddy and relaxed. A couple bowls to be high and happy. A complete burnt-out day where I come into work after being high from the second I woke up. And finally, the times where I come in (not purposely) SO FUCKING HIGH. Like, I mean I would just be smiling at nothing in front of customers, or I would just start laughing randomly out of no where..That's a no no. I'm a cashier, so my job is pretty fuckin slack when I'm high, but I can't get THAT high before work (it usually happens accidently).