tl;dr

Try various mixed drinks, and remember that you're allowed to nurse one drink, even if the bartender might give you annoyed looks. Believe me, if you have a low alcohol tolerance, finding something you can stomach might take a little experimentation. Try sipping what your friends are having, if you don't want to order a whole drink. I hate alcoholic drinks, but I found the classic Screwdriver works well enough for me.

Or just drink Cokes, and tell people you have rum in it, with no one the wiser. Or rightfully claim that you're staying dry because you have to drive. Drinking is the socially acceptable thing to do, but nobody's twisting your arm.

Sass, don't you have a water fountain at work? There's water fountains in like every building in the industrialized world, and even out in public parks. You don't need your own water bottle.

Jam it back in, in the dark.

I get all sorts of results for Mr. Carnegie's book on a search of the public library's database here. This is a fairly old book, so it should be in wide circulation, as I see there have been many printings of it. And public libraries are free! Now you really have no excuse.

Tsk, somebody's got it checked out a month overdue...

There's nowhere I can't reach.