[QUESTION] Bicurious male with girlfriend wanting penis

I have a question. I am a young male living in NYC with my girlfriend who has no idea I am interested in men and transexuals.I want to experience gay sex before I decide if it's right for me and if I should tell my girlfriend who I very much love. I feel like I am becoming less and less attracted to this beautiful woman just because I spend my days thinking about cock.What are discreet ways of finding men in NYC? Should I tell my girlfriend before I find a man to have sex with?