I would says 'depends'. No if you dont know someone very well. If 2 people know each other well e.g. long-time one line relationship or lived close before and n

I would says 'depends'. No if you dont know someone very well. If 2 people know each other well e.g. long-time one line relationship or lived close before and now happen to be in different cities that would be fine. I have done it with side a project. We worked together (remotely) on company jobs for few years communicating almost daily. Id say no problem if you know the person well and the relationship gels.