May just be intellectual laziness. Nevertheless, even per-capita rate of all-you-can-eat buffets would be a better metric.
I "think" using Excel spreadsheets. One tool I make frequent use of is the scroll bar, which I can slide to easily adjust the value of a cell and thereby other cells whose formulae include the adjusted cell.
A map like this has been linked to various demographic data: Number of Fast Food Restaurants, Robberies per 100K Population, etc. Link a "Slider Control" to choose you data source and then play around with it until the Map gives you what you want, "Trailer Park Rednecks", "Cold Hard Yankees" or "Hedonistic West Coasters".
As to the All-You-Can-Eat buffets, Gluttony comes in two types - Quantity AND Quality. One can produce obesity, the other can produce Epicurean snobs, yet both are Gluttony. Partaking of Quantity for an affordable price is not necessarily Gluttony. Neither does enjoyment of a fine meal. Moderation!