Okayama has some great tourist spots such as Ujo castle (Okayama Castle) and one of the top 3 Japanese gardens in Japan; Korakuen. It is convenient for travelers as they are walking distance from the Okayama station from which you can go to Osaka or Hiroshima with bullet trains. For fitness travelers, there is only 1 local gym selling a day pass to travelers in convenient locations and there is 1 hotel with gym room nearby the station. Please check out my recommendations below.
There is only 1 gym that sells a day pass in convenient locations for tourists in Okayama (red icon on the map).
Omotemachi Momotaro gym: Open Mon-Fri 10.00-18.00, Sat 10.00-17.00. Closed on Sun. Day pass costs JPY2000 for male and JPY1500 for female per visit. Great facility. See the official gym website.
There is no Anytime Fitness in convenient location in Okayama
There are only 3 hotels with gym in Okayama. For fitness facilities, Hotel Abest Grande Okayama is the best option. The location is also great as this hotel is 3 min walk from Okayama station. Also you can walk to Ujo castle and Korakuen garden.
Okayama Koraku Hotel does not have a gym room but it is an old school comfortable 3 star hotel in good location. You can walk to Okayama station in 3 min and popular tourist spots (Ujyo and Korakuen) in 15min, and more importantly to Omotemachi Momotaro gym in 15 min. The convenience store on the ground floor is very useful !