Located next to East Towne Mall, the Madison location of Portillo’s Hot Dogs has made a big splash. The dining room and the two-lane drive-thru have been doing brisk business since it officially opened on March 4.

This fast casual franchise uses the vibe of hot dog stands (and old school diners in general) as loose inspiration. The interior walls and ceiling of the restaurant are festooned with ‘50s kitsch — vinyl 45 singles, electric guitars, retro ads for Coca-Cola.