Looking for recommendations for things to do in Nashville. My wife's cousin is getting married just outside of there and we rented a house on one of the Cumberland River around Nashville.

We aren't staying long and half of Saturday will be filled with the wedding. 

However, what are the best places to go? I enjoy country music but what is currently open? I will have my two kids with me but would still enjoy some live music if that's possible. We are going to be down there on the 21st so if it's not open now, doubt much will change between now and then. 

Hoping to find a nice place to hangout with the family for a lunch or something and then see some sites. What do you recommend?