This past Friday, my coworkers threw a surprise shower for me and a coworker who is pregnant. They also all went in on a card with cash for me. (They probably did a separate one for her.)
I'd like to thank them, but I'm not sure how. I'm one of about 70 employees, and there were a lot of names on the card. Every etiquette site I've found recommends writing individual notes for gifts such as this, but I'm a bit daunted at the prospect of writing that many more thank you notes.
Would it be acceptable to write a thank you note to everyone and leave it in a place where they will see? If so, how do I start the note? ("Dear all" sounds a bit distant for this situation.)