What: Sloco Where: 2905 12th Ave. South When: 11 a.m.-4 p.m. daily Cost: $6.50-$8; $4.50 soup of the day; $3.50-$4 kids Info: 615-499-4793; www.slocolocal.com Before you walk into 12South’s Sloco sandwich shop, be ready for a tight squeeze. It’s small and narrow. A long prep table on one side has meats, veggies, cheese and sauces. Bar stools line up against the opposite wall in front of a long, narrow dining bar. At the end of the line, an iPad sits where a clunky cash re