We've got an app the lets you find and do fitness (in nyc) for $7.99 per month. [login to view URL] / iphone app: [login to view URL]
We've got 450+ activities and looking for someone to do 4 really light articles (to start with) on these activities from what we do. Examples: 5 yoga classes you've never heard of, Up and coming dance classes, Why is Hiit gaining popularity, 3 high intensity martial arts to burn your calories... etc.
You would probably need occasional access to iphone, ipad to do this assignment as thats the only way to see what we offer.
Does this sound like something up your alley?