Well, I made the groups for @knitting and @sewing and they seem to be working. Right now, Knitting will only boost from followers, but I have put in a request to make it from anyone that mentions the group.
So, uh... Enjoy!
Please boost so others that might not follow the hashtags can see.
Also, if you would like to mention the groups but not have it boosted on the group, you can use ! before the @
Thanks so much!