OP I understand. Enforced quiet weekends due to no money are very differnt to choosing to lay low because you're tired etc..
Due to a series of very irritating external factors we've had an unplanned shockingly hard financial year. We've had 10 months of watching every single penny & trying to survive. It's temporary so I don't feel like broadcasting our business to all & sundry or even to family so I frame things a bit differently.
I go to lots of free things - exhibitions in galleries, museums, walks in forests, the library, bookshop browsing etc
I try to squirrel away small amounts each week & about every month to six weeks I arrange a lunch in a gallery cafe or somewhere like that with a friend.
I joined an online book club & set myself the target of reading the books
I started knitting again.
So now when people ask I legitimately say oh I'm going to see the xyz exhibition & having lunch with a friend after
Or I'm going off for a long walk / cycle & I'll stop off for a nice coffee (even if it's a flask from home)
Or - I've loads of reading to do for my next book club meeting so I'm planning a sofa/ bed day with tea & cake & a whole day of reading
Or I'm heading to the xx big bookshop or library to pick up my next book for bookclub & a good old browse
invite a friend over for coffee & biscuits & a chat
None of those things cost much Apart from the lunch one but it def sounds interesting & gives your weekend a focus to share