Is there another restaurant similar to Sable?
I'm not sure exactly what you mean by "similar to Sable," but if you mean small plates with good drinks I'd recommend: Tavernita (Spanish influences, not the midwestern slant of Sable), Yusho (Japanese small plates with tasty cocktails), Quartino (Italian and more wine- than cocktail-focused), Girl and the Goat (we drank beer, not sure about the cocktails), Purple Pig (wine and swine), or the Publican (small meaty or seafoody plates + an impressive beer program). If you mean "helmed by a Top Chef alum," then GATG, Spiaggia, Sprout, or Frog N Snail.
You can easily find public transit directions online.
1. Go to maps.google.com
2. Search for "Soldier Field"
3. Click on "Directions" and then click on the "train" icon
4. Make Soldier Field "A" and for "B" type in "505 North State Street, Chicago, IL 60654" as the destination and hit "get directions"
5. Directions appear!