Arpana: If the men are doing it so are the women. From opening restaurants to starting hotels, actresses are also blurring the lines between the worlds of Bollywood and business.While actors like Mithun Chakraborty, Shah Rukh Khan and Suniel Shetty are thriving in the business world, their counterparts Sushmita Sen, Aishwarya Rai and Preity Zinta are also giving them tough competition.Sushmita