A farm-team effort for people who come because they ought to. It is a meeting in search of a mission. A remnant of the last great spiritual revival which has lost its original purpose. I guess I'm thinking that worrying about the Sunday evening service either way is irrelevant. The Sunday evening service is neither the central problem nor the solution.
Spiritual malaise is the problem, and a true revival of religion is the solution.
When such a true spiritual revival happens, people will hunger and thirst to gather more often to sing, give, testify, fellowship, pray, and hear you preach and teach from God's Word. They may gather on Sunday evenings, or at some other innovative time during the week but they will gather. I don't think it matters either way. If it is an oar moving the boat closer to revival, keep it. If it is merely moving the boat around in circles, toss it overboard.