I have dogs in my office. They run around and bark all the time. Their presence shows to me that serious engineering work is not important, but the image of being a "startup" is. The idea of a musical instrument being played while I am trying to focus on engineering is horrifying.

There's also a whole world of potential designs besides "drab cubicle farm" and "kindergarten mashed-up with ComicCon". For example, the 37signals[1] office.

If they want to show effort and interest in the workplace environment, they should try providing private offices with doors that close.

[1] https://37signals.com/office