Essential Wine Etiquette  When to toast, when to tip, when to
send back the bottle-these answers will put you at ease. By
Karen MacNeil  When a dinner guest brings a bottle of wine as a
gift, should you open and serve it? Yes. Though there's no way
to be sure of your guest's intention, wine is about communal
sharing and fun. So unless the guest specifically requests that
you keep and enjoy it later, serve it. Your guest will be
pleased. And if you already had a wine you planned to serve,
serve both. Tasting both wines will be an educational
experience.  When entertaining, do you need to provide fresh
wineglasses for guests each time you serve a new wine? Ideally,
yes. If more than one wine is served during the evening, it will
be easier if you don't have to monitor guests' glasses or ask
them to dump out a wine so you can go on to the next. That
doesn't mean wineglasses need to match. In fact, having a table
set with an eclectic collection of glassware is not only stylish
and fun, but it also sends a message