If that someone were intellectually, sexually or some-other-way attractive, would you have done the opposite and tried to meet up with them? There are a lot of people in the world, some more interesting than others.
The correct answer is: It depends. Because there have also been times when I went into the hall, fully aware that my neighbours were there. The mood required is one where one has enough energy to interact with people, and that includes ignoring them. But I'll confess - because I am unfortunately human - that attraction is likely to be a factor as well.