I stayed at the Phoenix Lodge with 5 other friends for a birthday. We had 2 triple rooms.
They were both spacious, clean and comfortable and a perfect base for our night out on the town!
Bargain too... and a generous late check-out which was needed.
We'll definately stay when we visit Watford again.
I'd recommend booking a taxi though, we decided to walk home at night and it took about 25 minutes.