DETROIT — Police may put the brakes on a party bus that was apparently operating as a Sunday strip club for reveling Lions fans at a popular tailgating spot in Detroit.Investigators believe fans tailgating before a recent Lions home game were allowed onboard the “Booty Lounge,” a large red and black bus replete with two stages, steel dancing poles, tinted windows and even a smoke machine, after forking over a $10 donation to its operators, Detroit Police spokeswoman Eren Stephens said Thursday.