Can you suggest any event venue that can be hired for a whole day?

Most of the venues I have enquired are for booking either in the evening or in the morning. Do you know any that lets to host even for the whole day? I am looking for a venue that has a lawn and if possible 1 room with a bed and bathroom. I would be nice if it could be in south kolkata but anywhere in Kolkata would do. Something preferably like the villa at mandeville, but they only do half days as far as I know.