Never having been a bartender, my knowledge of mixed drinks is limited. Tequilas? I'm your girl. But I just read there's a cocktail called a Montana, and the reviews don't make me want to run out and order one.
In all fairness, I haven't been to every bar in Billings. For the ones I have visited I am unable to order a "real" whiskey sour. When I say "real", I mean two things:
1) Don't use a sour mix
2) Must have egg white
It's the second one that is likely the issue for most bars, but a little raw egg never killed anybody...