language choice

Just a warning, what I am about to say borders on the too-much-attention-to-detail side, but as an excuse I will tell you it is not teacher-training induced. I have always been this way (well, at least since high school) so maybe that is some sort of excuse to mention such a nit-picky thing as the language used in a classroom (or anywhere else in life).
My biggest pet peeve is when people say "you guys" or "guys" when referring to a group of people that contains both males and females. I know I do it too, because it is easy, and the definition of "guys" is up for debate. But I really strive not to say it, as I don't want to dis-clude (is that a word?) the females in my classroom (or anywhere else).
Does "guys" bother anybody else, or am I totally dwelling on a 1950s definition of "guys"?
The alternatives are kind of messy and awkward: I don't like "guys and girls" and I don't like "boys and girls" (unless they are boys and girls - that is under 12 or some age). "Students"? "Class"? How do we refer to our "student body"? They're not "men and women," really - and I think that would be too awkward. "Young adults" -- as in "Okay, young adults, let's get to work." I don't think so!
Help!

(ps. my other pet peeve is being called a "girl" at this stage in my life. I've heard this time and again when people will refer to Mr. So-and-So as a "man" and Ms. So-and-So as a "girl" despite the fact they are both in their 50s. )
(Did I tell you my B.A. is in English?) (joke)