Members of New York City’s business community are forming an advisory group in an effort to guide mayoral candidate Zohran Mamdani if he wins the election in November.The group will include Andrew Milgram, who runs the investment firm Marblegate Asset Management, and Kevin Ryan, founder of venture capital firm AlleyCorp.OneNYC, an independent expenditure committee backing Mamdani, is organizing the council with suggestions from different sources including Partnership for New York City Chief Executive Office ...