Cass, just a suggestion. I think there should be three selections with at least one being a 'standard' (Funny Valentine, How deep is the ocean, Misty, Who can I turn to, Mood for love, You'd be so nice to come home to, What are you doing the rest of my life, I'm glad there's you, Ipanema, etc.). Then let the other two be Country, Latin, Pop, Jazz, Blues, Rock, Gospel, whatever. In fact, you can omit strict jazz tunes since the jazz guys will be okay with the 'standards' and nobody else is going to tackle the strictly jazz tunes (think Monk, Bill Evans, Wayne Shorter, etc.). I think using one 'standard' each month as an anchor genre', it will guarantee more participation.....or not. Just an opinion.
chas
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"Faith means not wanting to know what is true." [Nietzsche]