Traditional and Contemporary Services?

One thing that bothers me the most is a church that has "Traditional" and "Contemporary" Services. I'm ok with a church that might decide to go with some more contemporary music, as long as the preaching remains Christ-centered. My problem is with a church that has two different services so that they can get more people in their doors. Seeker-sensitiveism drives me nuts. If you, as a church, has some more contemporary music and might have a band, but keeps the preaching Christ-centered, is fine with me. But to have two different services? My question is why? The more we are like the world the less the world will listen.
Well this has been something that I have been thinking about recently.

Soli Deo Gloria