Postgraduate in undergraduate accommodation

I applied for a room at a private student hall in London a while back, which accepted both undergraduates and postgraduates, specifying that I would prefer to be placed in a flat with other postgrads (I'm starting my first year of my PhD). After moving in, I found out I'm the only postgrad in the entire flat of 5; most people are in fact first years. I don't mind this personally, but I thought that maybe my age could be off-putting to the undergrads. Especially concerning first years, since this is your first time living completely independently, you might have preferred to share your living space with other people in the same shoes as you.

Were any of you in a similar situation and what did you think of it?