So you’ve heard of casual Fridays? The Marine Corps is going in the opposite direction. As outlined in this week’s Marine Corps Times cover story, Commandant Gen. Jim Amos has decided that nearly all non-deployed Marines and sailors with marine units should wear their service uniform every Friday. Service B uniforms, or “bravos,” will be worn in the winter, while service C uniforms, or “charlies,” will be worn in the summer. Exceptions will be granted, most likely to units whose Marines get dirty on a regular basis. Think mechanics, grunts and others who aren’t working in your admin shop. Overall,…