For accommodation in the university, it may depend on several factors.
Primarily, whether the hostel/hall is owned by the school or private owned.

Most of the ones owned by the schools do not have flexible plans and is likely to be the same kind for every student. For instance, the university halls usually take 4 students in a room. Each room may have just 2 bunked beds shared by 2 pairs in the room. Unfortunately, these rooms may not be very spacious for the comfort of the 4 students.

However, those private hostels or even hostels on campus aside the traditional halls may have a flexible plan. One can decide on the number of people they would want to go into a room with. The very common ones available are;
a. One in a room
b. Two in a room
c. Three in a room
d. Four in a room

You have to note that the fewer the number of people in the room, the higher the value you will pay for it.

The last option is what we refer to as homestels. This is where someone else having a house around campus decides to hire some out to students. Some are very flexible such that, they let you decide how many people you would want to come into the room with. The amount of money they are going to charge you is usually fixed irrespective of the number of people you stay with.