Watford will stay at the so-called "lucky" Vale of Glamorgan Hotel.
The Vale of Glamorgan has 29 winners from 32 major football matches at Cardiff's Millennium Stadium, but Saturday's FA Cup winners Liverpool changed the trend after they set up camp at St Davids.
The Vale of Glamorgan housed England ahead of their World Cup qualifier in Cardiff and is the most sought-after hotel by teams competing at the Millennium Stadium.