The term 'casino, to gamblers' can be summarized by the crossword solution 'HOUSE'. A casino is a building or large room used for gambling activities. It is typically located near hotels, restaurants, and other tourist attractions. Casinos are often associated with luxury and glamour, and they offer a variety of games such as slot machines, roulette, blackjack, and poker. Gambling in casinos is a popular pastime for many people, and it can be a source of entertainment and income.