What do you mean by "room" and what hubs can rasp pi work with? Thanks
By mentioning room, they are answering a non Pi related question that you didn't ask. They are saying that they don't think that there is enough room between each port to plug a Block erupter into each one.
As for whether or not it will work with the Pi, you might look here:
https://bitcointalk.org/index.php?topic=253749.0Or, i'm told there is a list of working hubs in the Pi forums.