put a good/bold face on something, to

set

slang In community card poker, a hand containing two cards that have the same face value as one of the cards on the board following the flop. I had been bluffing when I raised my bet with just a pair of aces, but luckily the flop revealed an ace that gave me a set.
Farlex Dictionary of Idioms.

*(all) set

(to do something) prepared or ready to do something. (*Typically: be ~; get ~.) Are you set to cook the steaks? Yes, the fire is ready, and I'm all set to start.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

set

1. n. a period of time that a band plays without a break; a thirty-minute jam session. We do two sets and then take a twenty-minute break.
2. n. a party. Your set was a totally major bash!
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions

put a good/bold face on something, to

To make the best of things. This term has been around since the fourteenth century, and the practice itself, of pretending things are better than they are, is no doubt much older. “Set a good face on a bad matter,” wrote Humphrey Gifford (A Posie of Gilloflowers, 1580).
See also: bold, face, good, on, put
The Dictionary of Clichés by Christine Ammer
See also:
  • face card
  • paint
  • paint card
  • a busted flush
  • busted flush
  • a hole card
  • hole card
  • idiot card
  • play one's cards right/well, to
  • cards on the table, to lay/put one's