In addition to a large and a smaller hall, it houses a restaurant and the Wiesbaden Casino, or Spielbank, which is notable for allowing the "highest roulette stakes in Germany" (as of 2005[update]),[3] and where Fyodor Dostoyevsky was said to have received the inspiration for his novel The Gambler.

[5] Its main entrance, on the west side, faces the so-called Bowling Green, a grass-covered square with two fountains, so named by British spa guests.

Behind the Kurhaus, the landscaped Kurpark extends eastward, with a band shell and a fountain pond.

[8] This was a beautiful but relatively modest building with a columned portico, including Doric and Ionic features,[5] in classical style.

Since 1949, the main portion of the Wiesbaden Casino has also been located in the building, in the former wine hall.

Originally the South Reading Room, it was decorated with frescoes by the Art Nouveau painter Fritz Erler and by Alexander von Salzmann, and with pebbles and shells symbolizing water and earth.

The north wing houses the smaller ballroom (Christian Zais Hall), a restaurant, and the main portion of the Wiesbaden Casino, which offers roulette, blackjack, and poker.

Stucco decoration on the ceilings of the concert hall and reading room are by Arthur Storch.

The spa hall has hosted many important national and international events such as concerts, balls and conferences.