I ran into my first P-doc at Christmas time in Macy's. She stopped me and said "Hi Petunia!" all cheery and stuff. I smiled and said "If you're here picking out my gift, it's ok. I won't look." It kinda eased the awkwardness.
I run into T all the time.
Met her significant other once.
I guess because we've been "together" for so long it's no biggie anymore, but the first few times I hid.