Using a sewing machine, simply sew down the middle of a playing card. When you reach the end of one card, add another. Do not cut the thread; rather keep sewing to form long streamers. I used a deck that was missing a few cards. Why use new cards when you can use an incomplete deck. If you know people with kids, chances are someone has a deck with a card missing.
I used these card streamers for décor at a Mad Hatter’s Tea Party but they can also be used for a Poker party.