I've saved you a heap of a time by compiling all of these groups in one concise document which includes
A link to each group
The day/s you can advertise, and
Any hashtag/s required
 
This particular list is mostly geared towards women on Brisbane's Bayside...and while you're welcome to use this information pretty much as you please, I must insist that you check out the pinned posts in each group before posting to ensure that a. it's relevant to you and your business, and b. that you're not going to break any rules...because no one likes spam, and it's likely to do more damage to your brand than good.
 
(Tip: Ideally, you should probably pick a few groups to really engage with, and remember to try to add value where you can).