My department at work threw me a surprise shower yesterday. We work in a very busy office so this involved them decorating my desk and then there was food in an empty cubicle. Everyone gathered around for 5 minutes while I opened gifts, and then it was right back to work. In other words, it was VERY casual.
I know my two work friends definitely spearheaded the event. I know that there was a collection taken up for the gifts, but I have no way of knowing who donated. Do I write an individual thank you note to everyone? Can I write thank-you notes to the two girls who organized it, and bring in brownies or cookies or fruit salad or something as a "group thank you" or is that totally awful?