Half a beer when:
1. Anyone goes through the wormhole (Whole beer if they get
caught in the wormhole).
2. Whenever Cisco smirks at a officer trying to pick-up the chick
science officer who is really a slug in a girls body.
3. A Ferengi hits on the feminist first officer from hell.
4. Someone goes into the holographic brothel.
5. Enterprise appears.
Whole beer when:
1. Someone has to explain to an alien life form what is "time."