Ask HN: What are the must-haves for a new startup office?

My 2 co-founders & I are setting up a new office space for ourselves which is going to be our non-stop work centre for the next few months.

We are planning on renting a 3 bedroom apartment and using 1 bedroom + common area as our office. The rest will be used to crash in occasionally and sometimes for extended periods of time by one of us.

We want to set up a really productive environment and focus on a fun culture at the same time. All feedback is welcome!