My very good friend is getting married on Labor Day in Martha's Vineyard. I am in the wedding party. It's an outdoor, afternoon wedding. They have said they do not want formal wear. Now, the bride's (who is also a friend) idea is to have the groomsmen in trousers with shirts and matching floral ties. Now one of us thinks we should wear jackets, the other doesn't. I promised I wouldn't state my bias and look to you for your opinions. Thoughts?