Most of the activity in Tulum is all on beach road, which runs alongside the beach (obviously) & through the jungle. It's a very busy street, but all of the establishments are built in the similar minimal, bohemian style, which tries its best to be low-impact on the surrounding environment and gives the feeling that everything grows out of the trees.
I only lived in East Nashville for one year, but it has always been host to some of my favorite places & events in the entire city. The neighborhood is a concentration of creatives & artisans, so its offerings (whether they be food, music, or culture) are really cool & unique. If you are planning on visiting Nashville, this area is a must.