FWIW this isn't necessarily indicative of the number of ones in airports. For example "Istanbul Havalimani H-42 HPS Sbarro" only says airport in Turkish and "Aeropuerto Los Cabos" is in Spanish (though maybe these are the exception, not the rule).
Looking at it further, it does go both ways as well - for example "Gurnee Mills" is in a mall.
There also seem to be a surprising number of Sbarros outside of the U.S though they are all listed first in the list.
