An air dryer might cause about 0.3 bar pressure drop in your compressed air system. Basically this means that you have to run your compressor at a higher pressure. This of course will result in more energy consumption by your compressor.
Dressing for a gala event is rather simple. It is typically a formal wear occasion. For men, that equates to a tuxedo or at the very least a suit and tie. For women, formal wear is typically a long gown with high heels, matching accessories and jewelry.
According to the guru of etiquette Emily Post men should wear a tailcoat, a formal white shirt, white vest and tie, white or gray gloves, and black opera pumps (shoes without laces). For female guests, a formal floor-length evening gown is the right choice.