A wine club can have a blanket discount, for example 10% or 20% off. The club discount only applies to wines with Allow club discount ticked.
Allow club discount starts unticked on every new wine. This is deliberate: you choose which wines get the discount, so you don't discount a wine by accident. For example, you might leave it off an expensive or limited wine.
Turn the club discount on or off for a wine
Go to Settings > Products > Bottles.
Click the wine's name.
Under Pricing, check List your wine for sale? is Yes.
Tick Allow club discount to apply the club discount to this wine, or untick it to stop the club discount applying.
Click Save.
What happens next
Club members get the club discount on this wine if it gives them the lowest price. The club discount is worked out from the Full Price and doesn't stack on top of a sale price. WithWine charges the lowest price the member is entitled to.
Troubleshooting
The club discount isn't applying. Check Allow club discount is ticked on the wine and saved. Also check whether a lower price (for example a sale price) already applies.