...I may very well be an alcoholic--but I digress...
(As a woman who has had to hold her own with Lawyers, Policy Makers, etc)
Go with Whiskey.
My beverage of choice would be LaPhroaig 15 (or 10, depending on the bar), neat with a splash.
Alternatively, JW has nice whiskey's as well--go with Black label on the rocks--if no Black, go Blue or Gold.
However of you have to go with Vodka, stick to Ketel; Tequila, stick with Patron; Gin, stick with Bombay--these signify hard-worker, yet entice with a hint of sophistication.
Or, if you have to go with vino, stick with classic/heavier reds: stick first with cabs, then malbecs, pinots, syrahs/petit sirahs, then merlots...etc.
I would not go with whites, unless it is a lunch meeting, or it is being appropriately paired by the waiter/head chef.
Remember: stay bold and make an impression--at least if you can't do it with your words and actions, you can do it with your drink!!!
Hope this helps!
Cheers!