If there is no laughter, Jesus has gone somewhere else. If there is no joy and freedom, it is not a church: it is simply a crowd of melancholy people basking in a religious neurosis. If there is no celebration, there is no real worship.
The good news is that Christ frees us from the need to obnoxiously focus on our goodness, our commitment, and our correctness. Religious has made us obsessive almost beyond endurance. Jesus invited us to a dance...and we've turned in into a march of soldiers, always checking to see if we're doing it right and are in step and in line with the other soldiers. We know a dance would be more fun, but we believe we must go through hell to get to heaven, so we keep marching.
You are really and truly and completely free. There is no kicker. There is no if, and, or but. You are free. You can do it right or wrong. You can obey or disobey. You can run from Christ or run to Christ. You can choose to become a faithful Christian or an unfaithful Christian. You can cry, cuss, and spit, or laugh, sing, and dance. You can read a novel or the Bible. You can watch television or pray. You're free...really free.