会場 and 会館: an event venue and a hall building
Compare a park serving as a venue with a hall used for an event, distinguishing a building visit from using it as the event location.
The place where an event is held
会場, read かいじょう, means event venue. 今日の会場は公園です。 says that today’s venue is the park. A venue need not be a building.
会場が学校の体育館に変わりました。 says that the venue changed to the school gymnasium. The event location changed; the gymnasium building did not physically move.
A hall building for gatherings or activities
会館, read かいかん, names a hall building for gatherings or activities. 市民会館で講演を聞きました。 says that someone listened to a lecture at the civic hall.
会館は駅の近くにあります。 says that the hall is near the station. It gives the building’s location without naming an event taking place today.
A building used as an event venue
会館を会場として使いました。 says that the hall was used as the event venue. 会館 names the building, and 会場 its role as the event location.
会場を予約しました。 says that someone booked the venue. Whether it is a park or hall, and whether the event already took place, require separate information.
Does 会館を会場として使いました。 describe a brief sightseeing visit to the hall?
Show the answer and why
No. It explicitly says that the hall was used as the event location. Do not replace that use with a simple visit.