I'm also ready a complete Scrooge about NYE parties. But unfortunately my excuses were all countered. ("Can't leave baby that long? Bring him!" said nice hosts.) But I've suddenly heard that said nice hosts have decided to make their party frigging fancy dress. I loath fancy dress.
Someone tell me I'd not be unreasonable to pull a sickie or something?? Or otherwise, an easy costume idea. Something where a 4 month old is a good accessory.