Antipasto skewers. Genius! Those look like marinated or herbed bocconcini or perhaps mozzarella balls and artichoke hearts. Drizzle a little extra virgin olive oil and maybe some balsamic vinegar over them.
My go-to appetizer is homemade dill dip served with carrot and celery sticks and cherry tomatoes. Serving them up in individual shot glasses offers a little visual interest, and its grab- and-go portability makes them perfect for mingling. http://www.mybakingaddiction.com/quick-and-easy-recipes-for-summer-entertaining/
Yummy mocktails for non-boozy (but very cool) wedding drink alternatives