Frugal does not accurately describe my spending patterns in the year or so immediately following my cessation of work - "moderate tightwad" would be a better description. I came into ESR via a lay-off and am living on a lower stash than I was aiming for. However, my desire to seek more work was shaky at best, so I decided to see if I could make a go of it on my modest portfolio.
My penny-pinching ways would even have me declining social invites because they entailed a $10 door fee, or would require me to spend $10-15 on food and drinks. This was not as bad as it sounded because, truth be told, it was a good excuse for my INTJ personality to avoid going to things I didn't really want to attend anyway.
After a year or two of being a major Scrooge, two things happened -
1) I realized I could ease up a bit and occasionally spend on frivolous things, and
2) I also discovered (at no great surprise) that living on less than I had previously was actually quite pleasant. My transportation and food costs were lower in ESR than when I had been working, and I hadn't exactly been breaking the bank then either.
With the exception of a very minor part-time gig (which probably involves no more than a few days work a year), I stopped working almost 5 years ago, and have been withdrawing the same amount from the portfolio for almost 3 years now (no cost of living increases in the withdrawals so far). The plan is to continue to withdraw the same amount for as long as I can (within reason) in the hope that I can increase the withdrawals quite substantially later on. Given that my current WR is ~2.5% of the portfolio starting value (~2.1% of the current value), and also considering that a moderate amount of SS will feature in my future, I think there will be more spending money available at some point