Asking 'How was your night? Tell me more' signals she is the most interesting part of your evening

Sending 'How was your night? Tell me more' reads as desperate over-investment. Nobody genuinely cares that much about a casual contact's night out, and she knows it. Lines like that communicate that talking to her is the most interesting thing happening in your world, which is the opposite of the abundance and indifference that make a man attractive. If you feel the need to respond at all when she is out, keep it brief and indifferent: something like 'Don't drink too much, have fun.' That shows awareness without need. Or, if you actually want to link up that night, just ask directly: 'Are you still out?'