I was an event planner for years, and one thing I used to do a lot is get red and/or white roses in bulk, and red/white cranberries. Short wide round glass vases. Fill with water and cranberries, then add roses. ie: White cranberries can also be used really well with pink roses, because they often have a pinkish tinge. Gorgeous.
People always think beach, but I love our cranberry bogs.