Its pretty hard to distinguish people with ASPD, since most people go on with their life without knowing it. But I recommend observing those who are quiet, as long as you don't interact with them they won't bother you.
A library or a cafe is a good place to start, look for people who sit alone and far away from others.
A library or a cafe is a good place to start, look for people who sit alone and far away from others.