Look #1: This can basically be appropriate for any occasion from an open house to a more formal affair. Also good if the weather is iffy/chilly.
Look #2: This one is good for a little bit more formal occasion. Or more casual. You can go both ways. Also good for in between weather.
Look #3: This is good for open houses or barbecues. Still appropriate but not overly dressy. Also, no one wants to wear pants in 95 degree weather!
Let us know what you wear!