Hey Mez,
With my little girl, I didn't bother with a routine, I followed her guides, when she was hungry she fed, when she was tired she slept, to a degree I still do that, only her meal times are set times. When I started putting the routine in was when I started solids. Now, we have a happy little girl who gets up at 8:30am, has 2 naps through the day and goes to bed at 7-7:30pm depending how long it takes to eat her dinner.
I think it depends on your personality and beliefs whether you need a strict structured routine or a more flexible one that conforms to your baby. The main thing I really did with Kailee from extremely early was taught her to put herself to sleep, I didn't rock her to sleep etc unless she was sick or teething and too clingy, I found once she could self settle we got more sleep at night as she put herself back to sleep instead of needing DH or I to help.

Mez, with the playgroup, try keeping her awake that bit longer so she gets a little interaction, and then she could fall asleep and let you have adult conversation! She will probably become accustomed to not having a sleep at that time on that day. We do swimming lessons, and she knows when its swimming day we dont have a nap. They are very adaptable little creatures.

I hope that I could give another perspective... my main advice is to go with your instincts and your baby though!

Richelle

Oh and a helpful tip for bottles, if you keep boiled water in the frigde, when bottle time comes, (for a 240ml) put 100ml freshly boiling water and 140ml cold boiled water and add formula, perfect temp for bub to drink every time without the damage of the microwave!