Table schema:
CREATE TABLE Reservations (Room VARCHAR); CREATE TABLE Rooms (roomName VARCHAR, RoomId VARCHAR)

Question: Find the most popular room in the hotel. The most popular room is the room that had seen the largest number of reservations.
SQL: SELECT T2.roomName FROM Reservations AS T1 JOIN Rooms AS T2 ON T1.Room = T2.RoomId GROUP BY T1.Room ORDER BY COUNT(*) DESC LIMIT 1