Mr. Jenkins, perhaps you are infact a gentleman, if you are not I can help you. To be a gentleman in the truest sense of the word, you must be of noble birth or part of the aristocracy sir. For instance, I am a gentleman by birth alone, if not by action. My lineage is traced back to Count Engelbert III von Marck of the Rhenish Berg dynasty in North Rhine-Westphalia roughly around 1347. If you cannot trace your lineage that far back, that is ok...we will raise you from the ranks so to speak... so you may attend this important event, and i'm going to get you there friend. Your "treat all women with respect" statement has set you well on your way.
First, your attire. I would suggest, as a gentleman you obtain a tuxedo with tails from a reputable tailor. This will most likely be a black tie affair, so don't go with a white bow tie. White spats are permitted, and a top hat is a must. A walking stick ( the hallmark of any gentleman of taste ) may not be allowed inside, so bring at your own risk. Don't forget the top coat if the weather turns frigid or if rain is on the way. Also, a good pocket watch is a must. The topcoat I mentioned will also come in handy if your female acquaintance must cross a puddle in the street.
Second, your conduct as a gentleman must be that of tact and taste at all times. Check your hat and coat at the door with the hatcheck girl, give a slight bow when you shake hands, if you meet a lady on the way in, always tip your hat sir. Be prepared to partake in cigars and brandy if your other gentleman friends call for it. Always address males as sir, and females over 18 as mam or my lady. Any younger shall be addressed as miss. When you are finished with your meal, always cross your fork and knife on the plate. If by chance you meet me, you may address me as "My Lord", as I am of noble birth sir.
Now the fun part. Dueling. If you or your acquaintance is offered insult or injury, you may by all means "call out" said person and demand satisfaction by means of a duel. A slap across the face usually accompanies said demand. A true gentleman will fight a duel over a lady, but never over a "woman of the night" if you get my meaning sir. Saber or Rapier is usually the weapon of choice. If you need a second, I will gladly back you up old boy.
So, I hope this will get you going in the right direction, and allow you entrance as a "gentleman". Furthermore if you do meet a lady there, and she offers her carriage to her residence, I can only offer the advice my mentor gave me. Act like a saint in public, be the devil behind closed doors sir.