Manolo says, here is the Manolo’s latest column for the Express of the Washington Post. Dear Manolo, My husband owns a small company with 25 mostly blue-collar employees. Every year we host a company picnic at a local park, complete with hotdogs, hamburgers, potato salad and assorted games for the kids. I usually wear a summery sundress, but this year I’m having trouble picking out a pair of sandals. Please help. Marissa Manolo says, the annual company picnic is, together with the company Christmas party, one of the most dangerous events on the corporate calendar. There are so many things…