Sine i know a little about Dancing and Music, befor Jesus Christ started working in my life, i can tell you what i believe or would do in your situation. But i would suggest that you would study up on if and how music w/wo lyrics effects a person. 3 or more years i lived a very worldly life, and by the end i went partying up to 4-5 times a week in clubs ect...and since i was a good dancer i danced alote. Till this day i dance to Gloryfie either the Lyric, the Beats or if neither was good the Artist. So you can imagine that my dance had to fit with what the lyrics talked about or to "stick" with the beat. I also know that people get a certain High of Music and Dancing, again i would suggest that you study up on it if you are really concerned or just want to gain knowledge how it works. This High that people can get themselfs into, if they desire is UnGodly....has nothing to do with the Spirit and the person can actually get Addicted to that high, and it will replace in Church or outside the Holy Spirit. On the other hand Dancing is a from of Communication, for example sign language saying I Love You, you point to the Eye then your Heart then to the Person, dancing is similar or even the same, if someone dances and looks into Heaven and points towards Heaven he is Gloryfing the one who Sits on the Throne Jesus Christ "Hopefully", or if the person holds his arms Close together like he is bracing himself and moves back and forth might mean he is sorrowfull or afraid. So yes, im not here to condemn Dancing in a building were Jesus is being Glorified, David danced. But on the Other hand the Music or Dance should never be used to get an Emotional High or to Glorify anything else but Jesus Christ himself, if you see someone dancing rapidly, aggresive or believe he is trying to get an Emotional High, some of those dances if seen on the internet were i find no difference between those type of dances and an exorcism, and it concernce you, you should talk with the Pastor and treat it like every other issue you have in Church.
Hope i helped, sry for my english, it isnt the greatest lol.
I believe it takes more faith to worship Him when we don't feel Him than it does when we do.