The ravers who get high on God
Sloshfest organiser David Vaughan invited me along to experience the religious revolution first-hand.
The 38-year-old from nearby Pontypool is a former drug-user who makes no apologies for painting God as a party animal who wants to win over youngsters with supernatural highs.
Bizarrely, David greets me at the door wearing a monk outfit - he is joined by dozens of dancing pirates, an Abraham Lincoln, a unicorn, winged fairy and a court jester draped in Christmas lights.
After leading me to a quiet room away from the madness, David says: "This behaviour and message is bringing liberation to a world that doesn't want Christianity as it has been.
"People are looking for something relevant to them. If you like to party, drink and take drugs, our advice is, 'Don't drink Vodka, drink God-ka'.
"There is no greater high than the Most High. When you come into God's presence there is an intoxication that is overwhelming.
"It is filled with life and brings you to another level of joy unspeakable, liberating you from fears and inhibitions you find in the world. It is a blissful sense of liberty.
"This isn't offensive to the Lord, but it is to the religious folk who attend a dead organisation.
"Heaven is going to be wild. God will show up and be the life of the party. We want to see fun coming back into the Church."
Christians who claim to get high on the Holy Spirit and drunk on Heaven's wine have caused outrage in the USA.
Dozens of complaints about blasphemy have been posted on YouTube videos of the movement's best-known advocate, John Crowder.
The former alcoholic, whose fans are dubbed "Crowderites", is at Sloshfest and typically slurs through sermons about "smoking the Baby Jesus", being "whacked out" and "tokin' on the Holy Ghost".
Event organiser David reveals God guided him to establish Emerge Wales, the group behind Sloshfest, which calls itself "A rising supernatural movement in the UK who are burning for Jesus".