The plot goes deeper than ever I thought! Not so bad as having cookies underfoot, but much more devious, far more insidious. The cookies somehow found out where I work, and have managed to convince the employees here that I LIKE having "Happy Birthday" sung at me. Note I did say "at" and not "to." You don't realise how these people sing. Most of them couldn't carry a tune if it was nailed to them.
Now I almost look forward to going home to the cookie battleground. It almost seems relaxing.