I know when my sister and I went for her 51st birthday las February (We called it the two middle age sisters running amok tour) She got buttons from each of the parks and she got a lot of Happy Birthdays from CM's and Guests we rode in the front of ALOT of rides without having to ask. She was given little treats from the shops at EPCOT. I think the coolest thing she received was the Great Movie Ride actually gave her a b-day card signed by the the CM's who were working the ride that day. It was a huge card and very cute. I was so jealous. As far as restaurants were cocerned, when I made ps for the 3 dinners we wanted I asked them to make note of the fact that it was her b-day. Chef Mickey brought her a really cute cupcake. But no singing, the CM didn't say a word when she brought it, nothing. At Hollywood and Vine it was acknowledge on our sheet but nothing was done. And Whispering Canyon made her stand up and state her name and age to the entire packed restaurant. (which thrilled me no end) So I just guess it depends on where you are and how prominent you display buttons, etc.