The house has three bedrooms and one and a half 'baths'. [=one full bathroom and one bathroom with only a sink and a toilet]
Would you like me to 'draw/run a bath' for you? [=to fill the bathtub with water for you?]
a 'full bath' [=a bathroom with a sink, toilet, and a bathtub or shower]
(..) - Marvellous. She's in love with the hotel plumbing. She's either in the swimming pool. She swims for hours. She's a fish. lt's quite incredible. Or she's in the bath. Actually, she's just outside. Chaps only in the Long Bar. Mrs Clifton. You'll have to forgive us. We're not accustomed (..)1996 The English Patient