Option 1: desirable -> means "worth having or attractive" - fits perfectly as convenient location makes it a suitable venue.
Option 2: desirous -> means "having desire for something" - grammatically incorrect here; it describes people wanting things, not venues.
Option 3: imminent -> means "about to happen soon" - doesn't describe a venue's qualities.
Option 4: judicial -> means "related to courts or judges" - irrelevant to describing an auditorium venue.
Hence, Option 1: desirable -> The convenient location makes the auditorium an attractive and suitable venue for the ceremony. "Desirable" correctly describes a place worth choosing due to its beneficial qualities -> correct