Some people develop a wet fish handshake for professional purposes - to tell the person they are dealing with that they are somehow open, listening, even pliant, malleable, ductile and so on. This can be merely to lull their contacts into a false sense of security. I don't like it, but I also don't like having my fingers broken.
and when they raise their glass to you they look you in the eye
and if you don't have a glass, get one. I've just been handed a bottle. This means I now have to give up my computer for a little while. Fair payment? That depends on what's in the bottle.