DIY inspiration: Menu napkin rings. I love this idea. For large gatherings, add guest names and this can serve double duty as place card and menu; for smaller or more close knit gatherings...this adds style and glamor because it is so unexpected (at least in my home!!).
Repurpose the picnic table (bring to deck for large dinner party) burlap tablecloth with a lighter color burlap table runner, sunflowers galore with blue tinted Ball Jars filled with votives. This says welcome summer to me!