But card room operators say the proposed rules could make gambling in places such as the Bicycle Hotel and Casino in Bell Gardens and the Hustler Casino in Gardena so onerous and complicated that gamblers may abandon them for casinos in Las Vegas or on tribal lands, where the rules do not apply. The tentative rules follow a year of hearings on card rooms held by the state’s gambling control commission. The state Bureau of Gambling Control has proposed new rules for California’s 72 card rooms that operators of the establishments say could make games such as seven card stud poker, pai gow and baccarat more complicated and a lot less fun.