[MrDK]

Welcome to the board Mike.

Not falling for these girls can be hard, and the will help making it harder.
In the morning the only things that should be on your mind (if you are not looking for a GFE or relationship) are how intensely you should kiss her goodbye and your plans for the next evening will be.

As for tipping, never let others give the girl the tip you intend her to have, they might think it's for them. Just slip it under the purse in the room (this includes all compensation when concluding an LT).