It seems like it would just be easier for your bank to say, "Hey, we don't want the hassel of club accounts anymore, so we are discontinuing them."
Perhaps change your account parameters and structure and say "Minimum balance of 5.00 to open and maintain account, but interest accrues on balances of 500 or greater."
We have a savings account like this...100 to open, no minimum balance and no monthly fee, but interest only accures and compunds daily only when the daily balance is greater than 2500. Actually a pretty popular account since we pay in excess of 4% for balances over 2500.
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