Any readers out there have suggestions of a house / retreat center / conference facility that could accommodate 13 progressives for a night in January?

I’m going to be leading a strategic planning retreat for a progressive think tank, and I need to find somewhere comfortable and quiet to elicit the teams’ best thinking. Ideally, somewhere within a one hour drive of Manhattan. I know of many places 2-3 hours away; but accessibility to NYC is key.

Even if it was only a house rental, that could work well. Modest budget, respectful group of people.

Any ideas at all are welcome — tate at tatehausman d-o-t com.