Hello,
1. If they say something about smell then you should go clean the character (WC / toilet )
2. If that is not the issue then make sure you have a combo milk cup, non-mix type (when picked up it shouldn't show a blue ? icon). To fix that you must:
- Go to the collector (in nest) and interact, then select flush (empty the colector)
- Fill the Milk bucket (in nest) > pick it up and interact with collector nearby , then select fill > drop the bucket, go outside to your bar > interact with it (Left Mouse Button) > select the desired collector, you'll get a milk cup spawned near > interact to pick up the cup > go near a crowd NPC > Target the NPC (tap middle mouse button) > tap the milk cup slot number (ex: if it's in slot 1, then tap 1) > now press and hold Right Mouse Button > if the NPC can drink you'll get 2 options (Free- give extra reputation but no money, Sell- gives money and a bit of reputation) or a message (in which case you should just keep searching). Check the 3'rd gameplay video (in main post above). Also make sure you don't have multiple mixes in the same colector (writing Mix as the combo) , those don't sell too well (you can also check the icons above the milkcup in you quick slots, if it's ? then it probably won't work).
Here are some reference walkthru:
https://www.pornhub.com/view_video.php?viewkey=ph6396357d71bb9&t=2927 [milk to collector]
https://www.pornhub.com/view_video.php?viewkey=ph6396357d71bb9&t=3209
[offering milk cups to crowds]
Cheers,
~NK