Inside this 1950s-style American diner, waitresses softly sing along to Aretha Franklin as they sling hamburgers and whip up milkshakes. The jukebox belts out Ritchie Valens as a customer wearing a Muslim prayer cap and flowing blue robes ambles in.
This isn't the U.S., where the kitsch restaurant chain Johnny Rockets has several hundred locations, but instead Nigeria, where foreign companies have hesitated to invest because of logistical challenges, poor electricity and government corruption.
