Torajiro is a friendly, easy going place that on any given weekday evening you can certainly find families with children at around 6pm, and later Japanese business men eating, drinking, and talking business; after 10pm until 1am, a diverse group that might include creatures with orange and blue hair with torn jeans and shackled leggings. These groups pass like ships in the night and because of the dining times never interfering with each other.
I prefer the upstairs dining room; however, others flock to the downstairs semi-private and private rooms. There are also private rooms upstairs as well.