Will hopefully be in Brussels this august

I'm looking for a place to volunteer while in Brussels for a month. I speak ONLY English so I know that narrows down my choices greatly. I've tried emailing some event coordinators for the upcoming summer festival in Brussels. And I'm waiting on a response. I'm also looking for a decent hostel that is reasonably priced, in walking distance to the centre and has good reviews. Any suggestions?

be-housing.be/en/b/budget-flats-brussels

cassiopee.be/index.php/en/

A bit more upmarket:

axl-aparthotel-brussel.be/

Of course, also airbnb.com

Hello,
Don't know if it helps but if you talk to  "Chalks" at People to People Belgium, I bet he can find a way to help you out... He is on FB as Chalks Corriette...
I believe he has a FB site for People to People Belgium also. He is a not for profit operation that networks people here in Belgium...
Hope it helps
Regards,
Howie aka Zipper