We need to focus on something positive- however slight, about a person. This diffuses the tension between the individuals. Though, it may take effort and time to communicate.
We must continue to stick to our admiration of just one aspect of the other person.
Eventually or immediately the other person will also stop reacting to us. Try this for yourself- IT ALWAYS WORKS.
If you are waiting at a place, watch your mind and you will find how it moves from individual to individual, all strangers; always forming opinion. It is the nature of mind to act in this fashion. So don’t be wary.
While doing this try to locate something nice in a person instead of negative facets. By doing this we would have done ourselves a great service!
Even this can be a form of meditation.
How can thinking well about someone we dislike be of any service to us?
Hate fosters a sense of duality. Ultimately this sense of duality means a sense of US against THEM feeling which is the root of all the sufferings.
The highest Yoga is the one of equipoise and equipoise never exists in the midst of duality.