Besides having 2 Yorkies myself, one of each Artie & Abigail. Three neighbors in my Complex have Yorkies, 1 is a senior male @ 8 yrs. old, 1 is a male puppy @ 9 mos. and the last one is an evil 5 yr. old female.
We make appointments for our walk's together, depending on their schedules? I make it a point for Artie to play with them! Even though the first and last ones I mentioned are viscious and snap and bite at him. Since they have not been "Socialized" he just jumps and hops out of their way, because he is so determined to play with them.
He plays with all the big dogs at the Dog Park, but Yorkies have their own behaviour and language among them. I's so different to watch how they inter act. Plus my girlfriends all have Yorkies and if they don't, they are all trying to buy one!