When we hosted my parents 50th we bought inexpensive mismatched but same color frames on line and used three framed photo's on each table and a small vase of fresh flowers as centerpieces.We let any guest who wanted a photo take one home. It was great for the grandkids to have a wedding photo of their grandparents.
We also made Italian wedding cookies and put them in clear cellophane bags with a photo sticker to hold the bag closed, each place setting was set with a bag of cookies.
My brothers friend acted as a DJ and we played my parents song and music from their era. there was some dancing. My oldest brother and several volunteers toasted but mostly people seemed to just enjoy socializing with old friends.
I hope this helps, have a great party.