I attend a two-day meeting in New York every couple of months and the organizers always arrange a nice dinner the first night. They seem willing to spend a reasonable amount of money and it is not a working dinner per se so we don't necessarily need a private room, although it would be nice.
It's an interdenominational Jewish group but two of the participants are Jewish educators who work for the O-U so the supervision has to be one that is widely accepted in the mainstream Orthodox world. Members of the group live all over the country and don't all have access to lots of kosher choices. Many of the non-Orthodox participants eat dairy in non-kosher restaurants so a meat restaurant is highly preferred. The director of the program is soliciting our input for the next dinner, the last one of the year.
So far we've been to Abigael's and Shalom Bombay. At Abigael's we did have a private room. At Shalom Bombay they just pushed together a bunch of tables so we could all sit at one long table.
The restaurant needs to be within reasonable walking distance of Park Ave. and 30th Street -- they won't charter a bus and don't want to force people to deal with the subway or cabs.