"The form of rap is no less godly than the form in most of our hymns." Check out this great post about music by Ed Stetzer:
7 Biblical Tests for Christians and Music
Community groups, bible studies, and small groups do not necessarily equal missional communities. Todd Engstrom explains the differences in this article that will challenge your perspective on small groups:
What Makes a Missional Community Different?
People get caught up by theological labels, but I wonder how much they actually think about those labels?
Debatable: Why Are There Calvinist Baptists but No Lutheran Baptists?