What do Americans call hen dos?

In the United States, a hen do is usually called a hen do, and the groom's version is a stag do. Some people also say "hen night" in the UK, but in America you will hear "bachelorette" far more often. The American version tends to be a single evening or a weekend away, often with matching outfits, games and a night out. The British hen do can be more varied, from a spa day to a city break to a countryside cottage weekend. If you are organising a hen do for an American guest, or attending one in the US, just use the local term and you will be understood. The spirit is the same everywhere: celebrating the person getting married with their nearest and dearest. There is no legal meaning to either term, so you can call it whatever feels right for your group. The important thing is that everyone knows what is planned and feels comfortable joining in.