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.
The invite says: White Tie. This is the most formal of all wedding dress codes (think state dinners and the Oscars). He should wear: A tuxedo, a long black jacket with tails, a white pique vest, and a bow tie. Black, formal shoes and even white gloves for dancing are appropriate.