When sports gambling is formally legalized in Washington, fans will have the option to place bets in convenience stores, bars, restaurants or from their living room couches. But the most visible and elaborate betting venues could feel familiar to Washington sports fans: the high-traffic arenas and stadiums the city's professional teams call home. Mayor Muriel Bowser is expected to sign legislation that grants four arena and stadium operators the option of creating Las Vegas-style sportsbooks on-site. The exact timeline was cast into further uncertainty this week when the city council delayed a key vote that would have allowed the DC Lottery to begin negotiating with a preferred vendor. While the first legal sports bets likely won't take place until summer at the earliest, teams and stadium operators are weighing their options and deciding how they want to forge ahead. A city-sponsored study estimated that 150-200 Washington businesses might seek licenses to take sports bets, but the bill that was approved last month by the city council grants special privileges to the four stadiums and arenas. If those operators choose to get in the gambling business, no other entity can take sports bets legally within a two-block radius. That means the most prominent brick-and-mortar sports wagering locations in the city could be Capital One Arena, Nationals Park, the newly constructed Audi Field and the St. Elizabeths East Entertainment and Sports Arena. While the city works out details on regulation and licensing, those four stadium operators have to decide whether the potential revenue is worth the investment to create a glitzy sportsbook in and around their facilities. Officials with Capital One Arena owner Monumental Sports, the Nationals, D.C. United and Events DC, the District's convention and sports authority, which runs the St. Elizabeths arena, declined to discuss any specific plans before the mayor has signed the legislation into law.