NYC Night Clubs for Bachelorette Party in July?

Wigs, banners, sashes and signs and gay clubs?? You have lots of criteria there. I would suggest you contact the local chamber of commerce and let them know your requirements so they can set you off in the right direction. I would not worry too much about men trying to pick you girls up. Men can see when girls are shut down for that sort of thing. If a single woman puts out the signs she is interested, you cannot stop those men from receiving the signals of "I am available".