There is something beautiful and elegant about simple (simple does not mean boring!) event décor. A clean look makes an event look well put together. When there is too much going on, I think it can take away from the event. Here are some simple décor examples below that I love and are perfect for summer:
I love the use of mason jars at an outdoor summer weddings, these flowers add a great pop of color. This is simple, but makes a gorgeous centerpiece (and easy DIY).
For someone that wants a different, unique feel to their event, this a great example of simple décor. I think this is stunning!