<human>:  Can Viper Room concert hypothetically be held at National Diet building?
<bot>: Yes, a Viper Room concert could hypothetically be held at the National Diet building. The National Diet building is the legislature of Japan. The Viper Room has a capacity of 250 people. The National Diet building has two wings with over 700 seats. So a Viper Room concert could hypothetically be held at the National Diet building.