As a trainee manager, it is likely that you would need to spend some nights in the hotel. Trainee managers often have to work long hours and handle various responsibilities, which may require them to stay overnight at the hotel to ensure smooth operations and address any issues that may arise. Additionally, staying at the hotel allows trainee managers to gain firsthand experience and understanding of the hotel's operations, guest experience, and overall management. Therefore, it is true that trainee managers would need to spend some nights in the hotel.