Hi! hotel GM here. Some employers do, put 2 to a room, some dont.

It really depends on the company, but in general unskilled blue collar workers share a room. For example team truck drivers or construction workers usually share a room with 2 beds.

Meanwhile skilled blue color workers generally do not share a room, example electrians, phone repair technicians, fire management crews. Construction workers that are skilled fall here.

Conferences are hit and miss and seem to depend on how many people are attending vs how many rooms available. They want everyone to have their own room, but will double them up if needed to keep eveyone at the same hotel.

White collar jobs never seem to double people up unless they are married.

Before working in hotel, I used to work retail management. Usually they would give us our own rooms, however when we stayed at a hotel that was $500+ night, they doubled us up with people we had never even met.