One of Hollywood's biggest nightlife empires is now facing a major legal showdown ... and it's coming from someone who says she helped build the brand that celebrities made famous. According to court documents, obtained by TMZ ... Marsha Molinari , a longtime business partner of The h.wood Group -- the hospitality company behind celebrity hotspots Bootsy Bellows, Delilah, The Nice Guy, and The Peppermint Club -- is suing the company and its founders, claiming she was denied her share of a