It may be easier to book a tour through a travel agency as one must provide a car for the tour.
The hostel is in a large flat in a lovely communist-style apartment block.
Also club soda seems difficult to procure, at least in English.
They have a lunch special for about 50 lei.
On-site dining options include a restaurant.
Spend a few hours exploring the exhibits, and pay attention to the walls, floors and roofs of the building.