I've personally known guys who've picked up strippers, for short and long term fun. (I'm not talking "take out" here, I mean real dating).
For what it's worth, I think:
#1 is irrelevant (they like you or they don't. Going more often won't make a girl like you more).
#2 is half-right: staring like you're a horny dog won't get you anywhere.
#3 is 100%. If you buy a dance, or talk in any direct way about money, you become a customer.
#4,5 Are not necessary. If the girl likes you, she'll go out with you whether or not you came with a girl, and whether or not you invite her to a party or coffee.
In general, I think you'll only be able to pick up strippers if you have no problems picking up 'civilian' girls and waitresses in a regular dance club.
Practice on the bunny slope. Do the double black diamond runs only when you know what you're doing, so you won't get injured.