In my country, it's very common for university students to rent a flat alone or share an apartment with other students. Colleges aren't very common for students to live on campus; everyone has to make do.
During my university years, I lived in an apartment alone. Luckily, I could afford this luxury, as I worked while studying.
I never had any problems with enemas, which I took about once a week for health reasons.
My senior year was spent in Belgium, sharing an apartment with three students, two girls and a boy, all German. The first period was difficult; I shared a bedroom with the other boy, and there was no privacy for enemas. I had a bulb enema, so it wasn't difficult to keep it hidden.
The first few months were difficult; I spent a lot of time in the bathroom, which bothered others. The bathroom was also very small and uncomfortable. I reduced the frequencies, and because of that, I wasn't feeling very well...
So I decided to tell the others about it, and to my surprise, they understood and accepted it.
So I started doing them in my bedroom. I'd let my roommate know, and he'd leave me alone.