Niche group handles big-money taxicab matters

On the 1300 block of West Lake Street, an unremarkable, cream-colored garage door tells drivers to honk their horn for entrance into R&J Auto Repair.Inside, a slew of half-assembled taxicabs, most in yellow paint, wait to receive engine repairs, a credit card machine or maybe a TV screen.The repair shop itself does not stand out. Hundreds dot the city. And here on Lake Street, the support beams …