Possible Clues:

• Spot of bubbly?
• Spa soaker
• Honeymoon suite feature
• Large outdoor bath filled with very warm water
• Place to soak and socialize
• Bum on the up, after house in Bath
• Relax here in warmth, extreme in the centre
• Place to relax
• Activity centre containing extravagant bathing facility
• Spa feature perhaps too much in activity centre