Nashville is a very casual town. That means lots of denim, tennis shoes, sandals, shorts & sun dresses. While you may want to dress more formally for a special dinner one night, bars & restaurants with dress codes are few and far between, so be sure to pack your suitcase accordingly.
Whether you are staying downtown or commuting there, you can expect to be doing a ton of walking. Be sure to wear flat shoes, sandals, tennis shoes, or cowboy boots. The bars are very close together, so you really shouldn't need an umbrella or heavy winter coat.
Most of the bars in Nashville require guests to be 21+, especially after dark. Many have bouncers that will card visitors at the door. You will have to show your ID 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're there.
The partying typically starts around 10:30AM in Nashville, every day of the year. Many bridal parties hail from towns with a late-night club scene, and while nights in Nashville are lively, this is a day drinking town. Pace yourself!
Tipping in Nashville is essential. The bars generally do not pay their musicians, which is one of the reasons why most drinking establishments in Music City do not charge covers. This allows bargoers to wander from bar to bar throughout the day, so please take care of the musicians. Servers and bartenders make under $3/hour as well, so don't forget about them either.