@Mame,
That's a great picture of you and Denise, love it!
Hm, if you don't have table clothes, why not use doilies. They're available in different colors, shapes or you could even spray paint them to whatever color you want. The smaller ones for glasses and the large ones for under plates
Of course, this would be a lovely center piece.
There is nothing more cheerful than sunflowers, plus they're cheap