If a guest asks for vodka, simply respond “Absolut or Ketel One”. If they ask for a glass of Merlot, simply respond “we have a fabulous appetizer special this evening that is perfectly complimented by the Merlot”. If they ask for a cup of coffee ask them “ if they would like a freshly toasted bagel with cream cheese”. Please be sincere. If you are not honest with your guest, they will deduce the subterfuge and not only will you not Up Sell but you will antagonize the guest as well.
Up Sell!