We celebrated our siver wedding anniversary at California Grill last year and had a wonderful evening. Our meal was superb and we finished off with a pre-ordered celebration cake, a sponge with white chocolate cream icing!

We were able to enjoy Wishes before dessert (did I tell you about the cake? Mmmm) although because of the size of our party (hangers on

) we couldn't get a window table. The viewing gallery is just a few steps away so it was no hardship.
When I made the ADR I mentioned the special celebration and did so again on the morning of the anniversary when I called to confirm our "special" ADR as had been suggested on these boards, also checking on the cake (had I mentioned the cake?) which I had ordered 48 hours earlier. The maitre d, shortly after our arrival came to take a photo of the 2 of us, the result of which is standing close to me right now, a reminder of a thoroughly delightful evening. (No pictures of the cake though.)
I'm sure there are other lovely places to spend your anniversary but CG certainly did it for us.
Have a great celebration.
Tony