We also lean away from a company operating such a facility as a profit-making venture. In our case, we actually DID have a long-term hope for the project. If it was as popular as it seemed likely to be, and if it had the ambiance of a casual, fun, non-authoritarian environment, and if it maintained that situation for several summers, we intended to some day quietly put a poster up near the stage, announcing a Sunday morning concert by a Christian Rock band. Hopefully, some people would show up for it. If so, they would find Gideon's type Bibles lying on each table, but there would be NO outright sermon or anything structured in a religious manner.
Kids are smart.
They would figure out the connection. Between listening to the Christian words of the music and possibly browsing through the convenient Bible, they might become slightly more receptive to Christianity. When we built the stage, I also designed it with the distant future intent of using in as an Altar in a Church environment. More correctly, as a Chapel. Some friends who had had very serious drug or alcohol addictions, and who became reformed through Christ, understood the concept, and mentioned that they intended to often be present, in case any individual felt the need to talk to a Christian.