What would be a nice hostess gift for a macrobiotic dinner party?!

Flowers! Or, a bottle of gorgeous olive oil, or lovely vinegar. (Or both.) Some nice fabric napkins. Maybe some kind of fruit, some beautiful berries. Some lovely honey, if that's ok. What about salt and pepper? You can certainly find some fancy peppercorn mixes or interesting salts at Whole Foods. What about herbal teas? You could make up a little basket with an assortment. (If you go to a smaller health food store you could just ask a sales person what they might recommend for someone who's macrobiotic.)

I think a basket with gourmet rice and rice crackers and various oils etc: would be nice