It’s the people in the room that would value the clothes. “Dressing to the room” was, I believe, a take off of “playing to the room,” which means saying what your audience will enjoy or appreciate most.
You’re right, I don’t.
http://fashion.about.com/cs/glossary/a/partydefinition.htm
“However, when associated with a wedding or other special event, some form of decorum and good taste should prevail. A dress for her or a nice pair of slacks and shirt for him are informal, but respectful of the event.”
http://www.canoe.ca/LifewiseWorkEtiquette/eti_work6.html
“Am I dressed appropriately for my position and responsibilities? Do not wear sneakers, tank tops, tee shirts or revealing clothing to work if you hope to gain the respect of your clients, peers or higher ups.”
http://www.askandyaboutclothes.com/Holidays/Christmas/HolidayParties.htm
"At the theatre, dressing well shows respect for the performers and your fellow audience. "
http://www.timesonline.co.uk/article/0,641-1584813,00.html
“It is polite to make an effort at dressing up for a formal dinner. It shows that you are taking it seriously.”
http://wiki-shorts.freestat.pl/11-1054-International_standard_business_attire.html
“However, when applying for work or attending business meetings, many men who do not otherwise wear suits will don them as a mark of respect and formality.”
http://www.csp.msu.edu/pages/qg/Dress_success_men.cfm
“Dressing professionally shows respect for yourself, the interviewer, and the company.”
http://forums.firehouse.com/showthread.php?t=75079
“I think the suit is the way to go, especially if everyone else wears casual attire. Not only will you stand out from the rest of the candidates but show respect for the interviewers.”
http://www.askandyaboutclothes.com/Clothes%20Articles/ClothesDOMakeTheMan.htm
“Dressing badly can be taken as contempt for other people or the situation you are in. Clothing is a way to show others that you have respect and consideration for the situation. If you have respect for the theatre, you don’t show up in shorts and a T-shirt to a Broadway play.”
http://experts.about.com/q/1755/1027992.htm
“This is the real reason I dress up fairly nicely to see ballet—to show my respect and appreciation for the performers.”
Does this look to you like there’s no reason to think people find suits and formalwear respectful (in situations like job interviews, performances, or weddings and funerals)? Wearing a suit or formalwear is respectful if the person (or group) finds it respectful.
Sure, but there are different levels of earned respect. I respect my mother because she taught me how to be an independent adult, and because she had many difficult times in her life and always managed to do the right thing. I respect a symphony musician because he worked and practiced hard to get to be as good a musician as he is. These are two different situations, and the respect I feel for my mother is greater than the respect I feel for a symphony musician, but they are both respect.
Even a total stranger gets enough respect from me that I won’t shove him out of my way or cut in front of him in line.
Your appearance makes a statement. Wearing extremely casual clothing in a place where most people are wearing formal clothing is making the statement “I couldn’t be bothered to think about anyone else, I’m the only one who matters.” It sounds like this is a statement you intend to make, or at least do not mind making, but perhaps it shouldn’t be surprising when people find it rude.