One by one, masked congregants walked up to a small altar at the United Church of the San Juans, weaving carefully between sets of chairs arranged 6 feet apart. They each selected a plate holding a Communion wafer and a tiny plastic cup of wine, then returned to their assigned seats.

That will be the new normal at the church as it resumes public services this weekend for the first time in more than three months, under strict guidelines from the state limiting occupancy, spacing and contact.

Worshi...