1 Cor. 6:12
"Everything is permissible for me" - but not everything is beneficial.
"Everything is permissible for me" - but I will not be mastered by anything.
In bible does not cover every single moral standards or sins. One thing for sure that God had given us guilty concious for all human kind so we had law,moral standards and above all God's standard.
If Law and moral standards allow, then what is God's standard. However, we knew in our guilty concious and moral standard that others will question our faith and our relationship with God. I believe that it is permissible,
1) If you can answer honestly that the activity is glorifying God
2) If you can answer honestly that the activity is not stumbling someone
3) If you can answer honestly that the activity does not grief the Holy Spirit.

Luke 17 - What Jesus said about causing someone to stumble.
Jesus said to his disciples: “Things that cause people to sin are bound to come, but woe to that person through whom they come. 2 It would be better for him to be thrown into the sea with a millstone tied around his neck than for him to cause one of these little ones to sin.