'tables whose' is a perfectly valid and usable phrase in written English.
You can use it to introduce a relative clause that describes a specific kind of table. For example: "We need to find tables whose surfaces are perfect for displaying artwork."
(Josef designed bedside tables whose drawer and knobs face sideways, toward the bed's inhabitant).
Mr. Buchanan coveted a pair of Egyptian-style tables whose lapis lazuli tops were too fragile to travel.
Large groups and families fill most of the tables, whose cushions remind me of those tied to mismatched chairs in a rural farmhouse.
In the dining car, people were sitting at the tables, whose white cloths had all been removed, drinking the free coffee.
Diners arrive to face a grouping of tables whose chairs face the door, which encourages gawking at the new arrivals and checking out the clothes, the hair, the jewels.
As the dancers race to the rear of the stage, pulling five rows of tables whose legs scrape and bounce on a flat surface, the program ends with a high-decibel screech.
Transformed pieces of furniture include a circular table whose top has discrete cut-out areas by Jean Blackburn.
He imagined a kind of executive fairground ride: a long conference table whose chairs moved around it.
They see a world full of discrete objects, like balls on a billiard table, whose properties are best analyzed individually.
He showed me a photograph of a man on the operating table, whose left leg was charred mush and mostly missing below the knee.
At one point during the evening, a wobbly guest backed into a table whose top consisted of a 19th-century Chinese porcelain platter.
