Well, if you referring to the etiquette of treating people -- treat them as you would want to be treated. I've only been there three times, but women, be they TS or GG, like being treated with dignity and class. A little bit of chivalry might be a plus also. It's no different at Peanuts in other words.

It's a $10.00 cover charge to get in; make sure you get your hand stamped if you think you might be coming and going. There is no dress code that I'm aware of,so attire can be everything from the latest skateboard gear, to Ives St Laurent business suits. Want respect ? Dress cool, both figuratively and literally (It's hot there in August). In other words, you don't have to dress like a runway model, but you won't pique much attention from many women dressed as if you just climbed off your skateboard. Dress like you give a damn.

Many of the girls/crowd heads to The Yukon Mining Company after Peanuts closes at 2:00am. It's an all night diner about five blocks away(and where I park). I would definitely put that on your to-do list. You might see many girls there that you probably couldn't or didn't see at Peanuts.

Anything else ?

Peanuts is a night club that happens to cater to the transgender crowd.  The only caveat is that there is some percentage of girls that are "working".  Please note that I did not say "all" girls but only "some" girls.  It is very evident which girls are on the clock as they can be somewhat assertive.  Other than that, relax, have a cocktail or two and act the way you would normally act at a night club, bar, or pub.  Have fun and be safe.