Are you in the UK? It's going to be a stormy weekend!
If I was on my own with a baby this weekend, I'd do what a poster up thread said:
"I'd be perfectly happy at home with the little fella. Just mooching around the house, napping, cuddling, playing, watching one of the million things on the TV."
More generally, OP, do you have any mum friends you can meet up with?
When mine were little you met other mums through Mumsnet local boards and Netmums "meet a mum" boards. Sadly I don't think either exist these days.
I wonder how it happens these days - I would imagine maybe local Facebook groups?
Anyway, you need to find yourself some mum friends if you don't already have some as it makes this stuff much easier.
I had a small group of friends with babies the same age I met through antenatal the first time, and Mumsnet/Netmums the second.
With the first group, we used to meet up in a local pub in the daytime - it was perfect. It had large sofas we could lounge about on, nice food and NO ONE else there at 11am when we wanted to be there, we had the run of the place. The pub loved us as it was mostly an evening venue and we brought in custom when it was usually dead.
Or, we had a local art gallery that used to be a great place for a group with babies - again comfy sofas just outside the galleries where you could sit as a group with the babies and buggies, and take turns to go see the art fitting round the babies needs.