If you venture to Las Vegas, it makes sense that you will end up in a casino at some point. After all, this is part of the entire experience, and you could hardly go to the city and not check out something that is such a core part of its culture.
However, if you do go into a casino, make sure that you are wearing your watch. The reason is that there is a tendency for there to never be any clocks in the casinos, and that is a blatant attempt to get gamblers to forget about the passage of time and just lose themselves in the games. People get nervous when they are clock watching, so that is just not possible, and there are countless examples of individuals missing out on other things as they suddenly discover that they have spent hours in a casino.
So, just remember that it might not only be money that you lose but also time as well.