I've taken a lot of heat from other Christians for actually moving continually away from any woman in church who dresses like that--for the same reason I'd keep moving away from a person carrying a lighter if I were carrying a carrying a tub of gasoline.
I would sit in the front, just to limit what I was able to see; but at some churches, they have the trouble come right out there on the stage/podium. I remember a "drama" that one of the church leaders (a woman) put together, in which about 8 girls came out to do a "fashion show" demonstrating the pieces of Christian armor. Some of the girls came out swiveling their hips unbelievably. At the end, they had the girls turn around, BEND OVER, and take off the pieces of armor, before leaving the stage! It gets pretty ridiculous, especially when hearing the downplaying of this kind of stuff.
Sexual modesty is just as much about how one MOVES, etc. as it is about how they dress. The dress is many times just a beginning, an indicator of the behavior that really follows, sooner or later. I don't know of any truly quiet spirit that persists in showing big cleavage, hip-hugging pants and shorts, midriffs, long splits with heels, etc. Despite being gently approached.