The 2019 R3 Summit will be held in the heart of Downtown Baton Rouge at the Hilton Baton Rouge Capitol Center .  It is also supposedly haunted which should interest paranormal enthusiasts.
A video of the hotel can be viewed here 

On-site food:
The Hilton Capital Center is a four-diamond hotel with numerous amenities including a bar (open until 2AM) and a hotel restaurant, “The Kingfish Grill”. (http://www3.hilton.com/en/hotels/louisiana/hilton-baton-rouge-capitol-center-BTRCPHF/dining/index.html) Room Service is available until 11PM. In the morning, the bar is a coffee stand.