Haha, I can see why you didn't pick it up! xD That's pretty expensive for something you wouldn't have a use for outside of the photoshoots. Do you or any of your models have any older/less used dining tables, perhaps? Maybe a set of those cheap plastic picnic tables and chairs?
Also, I looked around your gallery a bit and you mentioned preferring if suggestions were specific. In the event that you do find a table/desk to use, here were a few ideas:
> Two people holding a conversation at the table; perhaps some with both people on the same side of the table, as well as sitting across from each other.
>Writing/drawing at the table
>Pictures from the back, front, and sides, to allow for both exact pose references and just a closer reference for where limbs a the body would line up to, even if they don't appear in a particular drawing (this sort of understanding is something I'd find really useful for, say, trying to draw a comic of people sitting at a table)