Preferable would be a plant with a morning and evening service each Lord's Day. During the morning, something like Calvin's liturgy would be used to ensure that the gospel would be kept the central theme of the service. There would be a public prayer of repentance issued by the pastor/teacher to which the congregation would add an amen. After the intermingling of a-capella Psalm/Inspired text/theological hymn singing and extemporaneous prayers/Scripture readings from the men of the congregation, the word would be opened and a warm biblical/theological exposition would prepare the congregation for the Lord's Supper. Following the sermon, the congregants would line up to receive communion and the pastor/teacher would then assure the congregation of God's pardon to those who ate in faith, and a issue a warning to the unrepentant.
The evening service would combine biblical theological preaching and exposition of the Westminster Standards.
The kids would stay for the sermon and to observe communion, in the hope that the presence of the risen Christ would work miraculously beyond the cognitive limitations of our young.
There would be little 'religiousity'. The only offence to outsiders coming in will be the offence of the cross. Talk would be straight and big theological words explained. Doctrine would be labored over, heretics gored ferociously and weak believers fanned into flame by the clear promotion of comfort giving word/sacrament piety. People could dress as they please and dress to please the Lord. The minister would be free to wear a gown or not. No consciences would be held captive over matters indifferent.
There would be no choir except the congregation. There would be a Psalm of the month where the congregation learn to sing in three-part harmony.
Lord's Day observance would be applied with brutal/loving force. There would be no Sunday School during the sermon, no committee meetings, no evening youth group (maybe the parents of teenagers could have them round houses on an informal and rota'd basis), no proliferation of programs, no strong-arming the hard-working congregants into strength sapping, faith draining ministries. Instead there would be a complete focus on letting God work to renew His people for being salt and light in their secular, God-pleasing vocations.
The Regulative Principle for Worship would be applied with brutal/loving force. No one's cheesy or trendy preferences (no, not even the pastor/teacher's) would influence the form and content of sacred assemblies. Only what the word requires would be required.
Finally, it would not be a niche demographic making up the church. It wouldn't be a church for the young, the old, the hip, the not-so-hip or Reformed guys in their 20s with no girlfriend and a penchant for theonomy and downloading porn. It would be filled with people from accross the classes, races, ages and sexes.
Sounds good doesn't it? Am I naive? Probably.