60's 70's party theme

Hi

Im arranging my friends 60's 70's party in march this year and needed some funky, retro out their decor ideas I could use. The function is being held at her home, in her yard.

So far, we have a roofing cover, round tables ,a dj, cocktail barmen, but decor wise im not sure where to look for these things. I also thought of having a tiled black and white dance floor in the shap of a square becuase of the space we are making use of.

Any ideas.

Mish