Happy Day plus Pyromania

As they walk, by chance they happen across a building with "INDOOR BEACH" written on it.

Hmm...Dawn looks at it and considers the possibilities. Pools are usually large and have tall ceilings, so the smoke will be visible before people start choking on it. They frequently have several exits due to high volumes of people during peak hours, and there's lifeguards there to shout at people.

It sounds perfect.

"Hey," she says, stopping and pointing at the building. "This looks fun, right?"