If they had a weekend in Cajun country (possibly based in Lafayette), they could end up seeing probably three zydeco bands and half a dozen Cajun bands (there's music from morning to night there at the weekends!). I don't claim to be an expert on the area, but I could plan the weekend for them. There are certainly great bands to be seen in New Orleans, but the atmosphere out in the sticks is unmissable!

And Lafayette is between New Orleans and Houston!