Operators, including Scottish &Newcastle Retail's Bar Censsa and Long Island Iced Tea, have allegedly threatened to pull out of the £80m to £90m centre.
Star City has not attracted as many visitors as hoped and Mustard, owner of Brannigan's bars, said trading had been difficult at its late-night venue.
Bar operators want MWB to improve signage, security and public transport.
Star City's managers are angry about an Estates Gazette report claiming the complex is overrun by gangs of drug dealers and hampered by bad management.
MWB insisted the centre was doing well.
Two new restaurant tenants, Indian restaurant Spices and That Mexican Place, have opened in the past few weeks.