The golden rule for events such as this is to encourage audience participation. As you’re tasting the wine, ask people to shout out their own observations. Congratulate those who identify classic flavours (blackcurrants in Cabernet, butterscotch in Chardonnay and so forth) and perhaps even offer a prize for the craziest comment.
As well as talking through what makes grape varieties and classic styles distinctive, why not spend some time discussing wine faults too? If you happen to come across a corked or oxidised wine, pass it around and let people sniff it. It may also be useful to demonstrate the right and wrong way to open a bottle of Champagne.
Finally, the classic wine options game – where you make two statements about a wine which people must choose between – can be a good way to round off proceedings. Those who choose incorrectly sit down, while?remaining players continue answering questions until a winner emerges.