Some casino operators have paid more attention (and money) to enhance sportsbooks over the past few years.Ĭirca opened the 'largest sportsbook in the world' in 2020. Since people can bet on sports elsewhere, casino operators ensure the in-person experience is better than ever in Las Vegas. While much of the focus on sports betting is online, sportsbooks inside of Las Vegas casinos are more popular than ever. Sports betting has never been so popular around the country.