SELECT T2.decor FROM Reservations AS T1 JOIN Rooms AS T2 ON T1.Room  =  T2.RoomId GROUP BY T2.decor ORDER BY count(T2.decor) ASC LIMIT 1;
What is the least popular kind of decor?
SELECT T2.decor FROM Reservations AS T1 JOIN Rooms AS T2 ON T1.Room = T2.RoomId GROUP BY T2.decor ORDER BY count ( T2.decor ) ASC LIMIT 1 ;
select t2 . decor from reservations as t1 join rooms as t2 on t1 . room = t2 . roomid group by t2 . decor order by count ( t2 . decor ) asc limit value
What is the least popular kind of decor ?