I have seen the staff sing and note other special occasions many times at Ohana's. However, we happened to be there on my birthday last trip, and though we didn't have it noted ahead of time with the PS, dh mentioned it to the hostess at checkin, and they wrote it down. We did get a good table (window table to view the fireworks) not sure if the birthday mattered or not on that one, but nothing else happened. We had a really nice server, and we had a great time, as usual. I didn't know that dh had told them it was my birthday until we had left and were walking back to the room--he said, wow, I told them it was your birthday, and she even wrote it down--I thought they would sing or announce it or something. I was actually glad they had not, LOL!! But it still seemed kind of weird, that they wrote it down and everything. I agree with the usual: expect nothing, and be surprised if you get a little pixie dust. If you really want something to happen, try calling private dining and arrange something that you plan and pay for--that way you can confirm it over and over until it actually appears.