Usage patterns
〈場所〉に活気があるa place is full of energy/liveliness
This market is lively from the morning.
活気に溢れるto be overflowing with energy/liveliness
The festival grounds were bursting with energy.
活気に満ちるto be filled with energy/liveliness
The new store's interior was full of energy.
活気を取り戻すto regain vitality/liveliness
The shopping street regained its vitality through redevelopment.
活気を失うto lose vitality/liveliness
The town lost its vibrancy due to the recession.