i have been out at a few of my previous workplaces, but i keep quiet at my current one because i know my boss would be very uncomfortable about it and i don't want to embarrass her/make her feel awkward (she's staunchly religious/conservative).

i tend to judge whether it feels right before coming out (this is less of an issue these days because i'm no longer with a gf, and i also date guys). most places i've worked at it has never been an issue (i.e., whether i have a partner or not is never brought up) but - LOL - at the first place i came out my team actually did throw me a gay parade (coming out dinner). it was very cute and made me feel so good .