Extend the opening hours to 3am for one of the college bars (alternately for all the college bars)
The current situation:
All college bars close very early in comparison with the city bars. This forces most students to get to the city centre and pay for a bus and a cab. Of course, this leads to a loss of profits for college bars and also it exposes students to a more dangerous environment than that of the university.
Extending all college bars' opening hours probably would be inefficient (high fixed costs, few customers to each bar). BUT:
One of the college bars could be kept open till 3am, while the others follow their normal opening hours.
The 'open till 3am' bar can switch each day, so that students visit every college bar alternately.
Implementing this suggestion can:
solve the inneficiency problem
be a more convinient, cheaper and safer option for students
keep the profits for college bars