The people I work with would probably faint dead on the floor if they found out I'm stoned every minute I'm there. Seriously, I wake & bake, then get high at lunch with my assistant every day. I know I don't look like I smoke 'cause she didn't admit to me that she did until I'd worked there 3 months. She was stunned when I said I was stoned at that very moment.
Oh yeah, I'm the controller for a large construction company and I work with numbers all day, every day. One of those jobs you're not "supposed" to be able to do while stoned, so nobody suspects a thing.