500 Club
... that while top-name talent like Frank Sinatra, Sammy Davis Jr., and Martin and Lewis performed at Atlantic City's 500 Club, an illegal casino operated behind the scenes?
... that while top-name talent like <a href="./Frank_Sinatra" id="mwB1E" rel="mw:WikiLink" title="Frank Sinatra">Frank Sinatra</a>, <a href="./Sammy_Davis_Jr." id="mwB1I" rel="mw:WikiLink" title="Sammy Davis Jr.">Sammy Davis Jr.</a>, and <a href="./Martin_and_Lewis" id="mwB1M" rel="mw:WikiLink" title="Martin and Lewis">Martin and Lewis</a> performed at <a href="./Atlantic_City,_New_Jersey" id="mwB1Q" rel="mw:WikiLink" title="Atlantic City, New Jersey">Atlantic City's</a> <b id="mwB1U"><a class="mw-redirect" href="./500_Club_(Atlantic_City,_New_Jersey)" id="mwB1Y" rel="mw:WikiLink" title="500 Club (Atlantic City, New Jersey)">500 Club</a></b>, an illegal <a href="./Casino" id="mwB1c" rel="mw:WikiLink" title="Casino">casino</a> operated behind the scenes?