“Opponents repeatedly riffed on the project for containing only people who earn less than $26,300, rather than a mix of wage earners,” Wed. Journal says, in coverage of a public hearing at OP village hall about proposed conversion of an office building for low-income housing.
The writer wants to say that many made the same argument, but this is “riff” as “comment,” which is many steps removed from what the musician does with a series of chords. He plays it again and again — which makes “repeatedly” redundant, by the way — to the presumed enjoyment of listeners.
On another point, the article gives a location as the 1100 block of Ridgeland. South or North?