Well it really doesn't matter if its sadie hawkins or not, it depends on whether its semiformal, formal, or casual. Our winter semi-formals were sadie hawkins, and since it was our school's only semiformal, most people went all out. You should find out what it is. I don't think it'd be too hard to find out, just ask any girl, they'd have all the details. For formal, definitely a tux, I'd suggest a nice fullback vest and bowtie. halfbacks just make you look like a caterer or bartender. Semiformal- this can vary from a nice dress shirt and slacks, or shirt and tie, or even a nice suit. I know all the guys wearing suits got lots of favorable looks from the ladies

. casual- still dress decently, short sleeved polo with khakis. my rule of thumb- wear something that impresses the ladies. you can't go wrong with that. unless you think a pikachu suit would do the trick
