Yes, I take notes in the casino all the time. The only time I have had trouble was when the Suncoast prohibited me from playing slots and writing at the same time when I was taking notes for my Las Vegas slot machine survey. Camera usage seems to be much more tolerated lately, so lately I have been taking pictures of rule screens and pay tables when I have my camera available. I also usually have cheat sheets in my possession when playing video poker, in case I run across a hand I don't know how to play, which is rare. I keep the cheat sheets hidden but have never had a problem whipping them out in a pinch. The reason you don't see other players with cheat sheets is about 99.54% of video poker players don't know what they are doing and the rest have the strategy memorized.