Baby sprinkle?

I am organizing a "sprinkle" for a good friend of mine, has anyone heard of this? It's her 2nd child and she didn't want anything big, so instead of a big shower she just wanted something small, with only diapers as gifts. She suggested the place, it's a local cafe,and there are only about ten of us going.

I originally wasn't too concerned about decorations or anything since it's not a big shower and it's not like it's at someone's house. But now that it's tomorrow morning, I'm starting to think I should be doing more. I  bought a cute paper lantern garland to put up and I bought a cake I know she will love. I am also going to pick up some fresh flowers on the way there, but I didn't do any of the cutesy stuff of a normal shower. 

Is there etiquette for this? Or is it more dictated by her personality? She's not into the cutesy frilly stuff, when I asked her about colors she said baby girl's room is taupe and white, so not much help there.