To be honest, these days if you find a gambling site without sports betting, it seems that something is missing from the site. Sports betting is considered as an integral part of gambling and gamblers expect it to be included by default. Because of the massive popularity of sports and gamblers engagement, having a sports section increases the traffic and business on the site too.
Casino without sporting games is like town without market. In this days, sport betting gamblers are more than the poker players and slot game players and other casinos. Sport brings more people to a casino than other games. It the difference is that those who are still playing other casinos spend more than sports betters. One person from poker can spend up to $2,000 at a time but in sport betting 4 or 4 can play that amount at a time in different locations. But we have to consider the country as well because if the country gamble on other games than sports then he can omit sport but that would be a rare scenario.