Jim Manzi on counting cards:
My experience was that it was very easy to stay under the radar of casinos….Just play solo at the quarter tables, never spike your bet above 5:1, and play no more than one hour at casino before you move on to the next one. There are about 100 casinos in Vegas, so you can play ten hours per day every other weekend and only visit a given casino once every two or three months (for an hour each time). No pit boss will know who you are or care what you're doing because you're so far down in the noise. You can make a lot of money this way. Of course, nobody will ever know that you are taking them, and the emotional satisfaction arises from walking into this multi-billion dollar enterprise and walking out with their money because you're smarter and more disciplined than they are. In a bizarre way, you succeed through classical bourgeois virtues: self-discipline, frugality, ego control and steady work.
Once you realize all this, of course, you figure out that you can make a lot more money in that giant casino called Wall Street.