Well it depends on so many things!
The baby, the weather, the day, and the big one- how much sleep you’ve had.
I took my baby just us on the train halfway up the country to visit my parents at 8 weeks old, we line in London and have been to the pub, out for lunch, an exhibition, Kew Gardens, cinema (baby friendly screening)
It’s been great, he’s genuinely lovely company on those days.
I’ve also had days when I’ve begged him through my tears to stop grizzling so I can eat a bit of toast or brush my hair, because I’m functioning on about 35 minutes of sleep.
But it’s true that, as much as you can, it’s nice to think you don’t function purely for the baby. Try to start off small. A drink in a cosy pub in the early evening?