Nashville is a very casual town. That means lots of denim, tennis shoes, sandals, shorts & sun dresses. While you may want one special dinner, all the bars and restaurants are pretty laid back;
Whether you are staying downtown or commute there from a house rental, you will be doing a lot of walking. Wear flat shoes, like sandals, tennis shoes and cowboy boots. The bars are so close together, you really don't need an umbrella or heavy winter coat. You will only leave them somewhere.
Most of the bars in Nashville require guests to be 21+, especially after dark. ost have bouncers that will card at the door. You will have to show your I.D. all weekend, so keep it in a place you can easily access. A lanyard with a pocket, or a fanny pack may not seem glamorous , but it will be appreciated once you are there.
The partying starts in Nashville at 10:30 AM, every day of the year. Many bridal parties come from towns with a club scene and don't party till late-night. Nashville is a day drinking town. Pace yourself.
Nashville is a tipping town. The musicians in all the bars do not get paid. That allows you to wander from bar to bar with no cover charges. Please take care of the musicians. Servers and bartenders make under $3/hour so remember to take care of them, as well.