Two words: Fire pit!
https://www.bobvila.com/articles/diy-fire-pit/
You can make one in your dad's backyard for about $50. A little more if you want prettier bricks. Make one above ground so people won't trip and fall into an in ground one. Grab a few lawn chairs to sit around the fire, well distanced from each other. If you need a couple wind barriers (for you guys, not the fire,) there are also DIY ones to build for that. Alternately, you can simply
turn a portable BBQ into a firepit.
According to the CDC and other infectious disease experts, there is an 80% less risk of transmitting COVID outdoors versus indoors, because the breeze/wind naturally fans out and disperses particles. The farther people are from each other, the less of an infectious dose one may receive.