I use my whole house
I have a designated space in the lower level of the house with all the typical 'centres' .... dramatic play, block, book and puppet, floor toys, creative art and sensory table and so forth.
However on my main floor I also have a cupboard and a few baskets that tuck under our coffee table out of site with quiet time activities and a few sit and explore activities and some role play basket with dolls, Dr kit, baby props and so forth for arrival and departure time and quiet time to keep them engaged.
We do nap time upstairs on the top floor.