If you want to be like the cool kids, definitely make a stop at Grouchy John's. I felt immensely cooler just by stepping inside and seeing their decor and patrons. This definitely reminds me of a coffee shop I would come across when I lived in Downtown NYC. Funky music comes out of the speakers and eclectic art hangs on the walls that you can actually buy if you're interested in picking up some artwork with your coffee.
As for their menu-they've got a wide range of flavors and concoctions that I'm sure will satisfy your tastebuds. My best friend did get something with Nutella and her only complaint was that it was a little too thick. I really appreciated that they had almond milk as an option because not all places will offer that.
I definitely enjoyed the ambiance and could see myself just hanging there getting some work done, sipping on some coffee.