Gambling and gaming are two different things. Gaming is when you participate in legal, state sanctioned wagering. Gambling is when you place bets or wager at locations or online platforms that are not permitted in the State, which remains a criminal activity.
Casino is an aesthetic that is based around the theme of casinos, gambling and coin games. Casinos are designed to create a pleasant atmosphere to reduce stress and convey a "playground" environment, thus encouraging patrons to spend more money.