The Dreiklang is providing us with at least 3 of their backoffice rooms for sleeping, and we have showers etc on site, but we can wholeheartedly recommend the following hotels nearby:
Andi's BnB - Family-owned small BnB with complimentary vegetarian breakfast, ca. 9 rooms available starting at 129 CHF (single)
Gasthof Rössli - Cozy hotel with a small restaurant, Special Deal for MountainBytes Visitors, 120 CHF per night bookable via e-mail and reference "MountainBytes Demoparty"
https://www.roessli-steinhausen.ch/hotel


There is also a direct bus connection to Zug throughout the entire night (hourly past 1am) and a small hop over to Baar, where the local ibis Hotel is also offering an affordable overnight stay.