It all depends on where do the casino you want to visit are located at. We can use Vegas as an example, If you visited Vegas, No one will ever think that you are a bad person or affect your image since locals are expecting tourist to play on a casino because it is one of their main attractions. It will be the opposite if you visited on a religious country where gambling is I think taboo and no one are wanting to play with you. Just remember that if you are a tourist, Try everything you can do on that country, Don't restrict yourself because of some people judging you.