it is a card game.Euchre - Wikipedia I know it and love to play it when we can find people to play with. but apparently, it is not a super common game.
If a group that includes women are playing cards in a British historical special, it's most likely they are playing Whist which is an old English word for silence. It's a trick-taking game where you try to take tricks (high) or take not a single trick (low)