This is a Sunday brunch with the guys or family outfit! I feel like you don't have to wear dress pant to wear a blazer with a dress shirt. Just throw on some plain, simple jeans and add on that beige blazer with a neutral color dress shirt.
You can always pick out insecure people, by listening to how many backhanded compliments and subtle insults they hand out. The people who try and act like they have it all together are usually the biggest messes! So true.