Create a QR-code of your Wifi-info and put it on your wall so your guests can just point their camera at it to connect to it.
I assume this is one of the most advanced out there:
https://www.qrcode-tiger.com/?type=wifi
Especially the "data patterns" which I haven't found on any other generators yet. Some funky stuff going on those options
Lemme know if you guys know/find some other generators which works similarly