Wow, I feel like a spendthrift! I get $100 a month "blow money" and I usually spend every bit of it. I don't feel like it's too much, though, we can afford it and it's actually less than what DH usually spends.
We aren't wealthy but we can pay the bills and have a little extra. Anything just for me comes out of my blow money, including clothing, makeup, fabric, Starbucks, dinners out with friends, and fast food stops. I get my hair cut twice a year, but it's $50 each time because I go to a stylist I love. I got a pedi at the beginning of the summer, but I usually do my own. Makeup is whenever I need something new. I wear makeup pretty much daily, also earrings and nice clothing. I get incredibly depressed when I look like crap, so I make myself a priority as much as I can.
I don't know where my $100 goes every month, but it definitely helps my mental health, so it's worth it as long as we can afford it!