At new ideas at 15/10:
1. Make the venue has side effect. Every venue has their special unique side effect, to makes your actions difficult.
2. Keep continuous to the first point above. Such as cooking place like kitchen, it should be some exhaust system in this room, and the exhaust system makes your gas locker weak or no function.
3. Keep continuous to the second point above. Or a quite room such as library, no loud is allow and keep quite, so you cannot hold more then two girls in a time, if abducted the third one, someone will looking for the noise source.