I'd probably develop it into a poker training site. "Workshop" sounds more like a training type atmosphere rather than a competitive tournament atmosphere. While the boom may be over, as long as the product is good it will work.
For what it's worth, the .NET site is an active Asian site with different tournaments in different parts of Asia. No, I don't know any Asian language but the links all point to subdomains of different asian countries poker tournaments. There is also an Info site that is not developed. If you do make a success or plan on doing serious development, pick up the unregistered .ORG while you can as well.
Probably worth a spec site if you don't want to fully develop it. 100 seems a bit low (hell, if they had deep pockets they'd bet that trying to fill an inside staight!), but only if the site is developed somewhat.