I guess my question is do WELS churches stay to traditional worship services? Or will I find the same contemporary services, with electric guitars and a drum set with people dancing in the isles of the church?

If I were to give you a very brief kind of answer, I think I would be safe in saying that WELS congregations, generally speaking, adopt more "contemporary" forms of worship far less frequently than LCMS congregations probably do. There are, I believe, some WELS churches that employ less traditional approaches to liturgy and instrumental accompaniment, and they will likely bring you discomfort. But you are much more likely to find that the strong majority of our churches approach worship in ways that are well within your comfort range. Based on that I'd invite you to visit a number of our churches in your area and see for yourself.

I think it is fitting, however, to add a couple of additional comments. First, I sincerely hope that a church's (or synod's) approach to external worship forms will never be your primary criterion for selecting a home church. I urge you to focus more on the doctrinal basis and theological content of the church since that is what has the greatest influence on your soul-life and spiritual well-being. This is not said to dismiss liturgical approaches as unimportant, but to stress that doctrine is most important. You never mentioned this, so I feel I should.

Second, I invite you to spend some time listening to balanced discussions (even "debates") on the general subject of liturgy and worship forms. My purpose in inviting you to do this is not to get you to change your preferences, but to keep you from assuming that sinful or unworthy motivations are ALWAYS at the root of changes in worship forms. It's often not simply a matter of Christians "letting society dictate how to do things" as you phrased it. You may go to the "Search Q & A" portion of this web site and type in "contemporary worship" to view a number of questions and answers that will provide food for thought. Here is a previously given answer that in my opinion serves in a balanced way:

"Traditional" Lutheran worship has always allowed and even welcomed variety. You might be surprised at how many "new" musical settings were created for and used in public worship even in the 16th century. For example, Johann Sebastian Bach composed a new cantata almost every Sunday. The reality that so many WELS churches did not encourage variety in worship for so many years is not a good thing. It led too many people to the wrong assumption that worship ought not change.
The Lutheran Church is not hesitant to use new musical settings and compositions in public worship. The hymns of Martin and Werner Franzmann were not in in The Lutheran Hymnal, but who would say that they have not served our people well since we began using Christian Worship? Before 1941, no WELS member knew the Lutheran liturgy (or hymns such as For All the Saints or God's Word Is Our Great Heritage) but who would say that the use of the liturgy has not been valuable?

We have a wonderfully rich heritage of worship forms from the past, but we need to continually add worship forms from the present. We are wise to build on the past, but we are also wise to move confidently into the future.

The theological presuppositions of the Church Growth Movement are wrong, but this does not mean that we cannot learn some things from Church Growth writing. The CGM is all about touching people psychologically, and God created people to be both spiritual and psychological creatures. When the CGM tries to move people spiritually with psychological tools, it errs, for only the gospel can move people spiritually. But when it offers advice how people's minds and emotions work, we are wise to listen and learn. Our traditional attitude over against the CGM has been to "spoil the Egyptians"--stay away from what is bad but take what is good.

When congregations endeavor to arrange public worship to meet the needs of people--both the lost and the found--this is a good thing, not a bad thing. It was good, for example, that WELS pastors started to preach in English instead of German (although many protested vigorously!). There are growing pains in this endeavor, of course, and not all congregations make the wisest choices all the time. For this reason it is probably best that various points of view are heard when worship forms begin to change in a congregation, and that those who see the value of traditional forms do not quickly jump to other churches.