A 33-year-old woman is in jail accused of attempting a casino robbery in Butte, Montana at gunpoint. Police say Sylvia Ramirez Llamas entered the Lucky You casino, 3136 Busch St., late Friday night brandishing a handgun. Capt. Jerome McCarthy said Llamas threatened the clerk with the gun and demanded money. A patron of the casino tackled Llamas and wrestled the gun away from her, McCarthy said. The casino patron and clerk then held the suspect down until police arrived at about 11 p.m. Llamas is in jail on a felony charge of robbery along with a misdemeanor charge of possession of…