Help attending BSJ Project Nagoya

I will be attending Nagoya in April for a week, and was considering a trip to BSJ project. I have been attempting to make heads or tails of the website and find it is outdated and for a non-Japanese reading person, difficult to understand. The only thing that is current is their calendar, which tells you schedule of next 3 days.

http://www.bsj.nagoya/theatre

I was hoping someone who has had experience with this venue can help me. I need to know,
- is this a walk in venue, or do you need to book
- what kind of admission fee do I expect, do you have to pay to stay longer
- Does this place serve food/drink or is just show?

Thankyou in advance