A new fitness center recently opened taking over 100,000 sq.ft of warehouse space, part of which is a second story, open mezzanine level which overlooks the lower level. In this space, they have tried to attract various sports. They sublease space to the following: 1) 4 batting /softball coin operated cages, with an additional netted cage for pitching, hitting off the tee, etc. Private instruction is also offered. 2) Three full sized basketball courts that are also used for "other" sports and also includes a full sized track around the courts 3)A virtual golf area with private instruction 4) 2 racket ball courts; 5)a public health club 6) a separate health club for private trainers & their clients; 7) a small deli 8) a pilates & yoga studio 9)a sports therapist 10) About 4 other miscellaneous offices for a chiroprator, physical therapist, etc. 11) Tanning booths/ skin care. In addition they have a rec area with big screen TV's, video games, etc.
I know the space you are talking about is smaller, but maybe one or two of the above might add revenue on an annual basis. Good luck.