When I was at Microsoft about 15-16 years ago there was a fairly big poker setup. Where I was, and I'm sure across the board, the advice that was given was that we were free to have tournaments on company property, however, one of the rules were that you could never actively bet truly blind, i.e. you had to see your cards first. According to whomever decided that, that was sufficient to keep your poker game a game of skill, and not gambling, since if you didn't know your hand, you were just relying on luck, not playing odds.