There are a couple of reasons many Vegas casinos have adjoining shopping malls. One benefit has to do with the climate. With daytime high temperatures of 100°F or more from early June through to the end of August, guests favor climate-controlled environments, which indoor malls provide. Connecting malls to casinos is a great way for casinos to cash in on their patrons’ winnings. Las Vegas retail outlets attract millions of visitors each year. With billions in non-gaming revenue up for grabs, casinos are eager to cash in.