The Bride and Groom are at this hotel. It is a short walk to the City Winery reception, and a short drive, bus, or tram to the Old South Church.
Stay in the center, solid reviews, good price alternative. Tram, bus, or taxi to the events.
Closer to the wedding venue, and hey maybe you just don't like Marriott but want the assurance of a chain.
Good reviews, down in the center a bit closer to the wedding than the reception