For my group my wife has taken on this position. We have effectively defined the position ourselves, as it did not exist previously. As you indicate, she provides the refreshments and snacks. I also have her greet any new members if I am busy or if the meeting has already started. This way someone who has never attended before will feel welcome. In addition, since we have added childcare services during the meetings, she sets this up.
Our PTO has gone through a recent HUGE overhaul. I started going to meetings, and I then decided to volunteer for the Hospitality Committee Chairperson. I have a basic idea of what is expected (refreshments for meetings...). What else would fall in this category? I joined at the tail end meeting of the school year, so I don't have a phone/contact list (my fault! I forgot to ask!). Can anyone give me some ideas? Thanks in advance!