It has been miserably cold , and raining as well . It was so cold in the kitchen that we had the novel experience of opening the frig door and having warm air come out . When we have our evening glass of champagne the glasses are colder than the liquid , so you get half an inch in the bottom of the glass and the rest is froth .
According to the above context, answer the following question.
Why are they drinking champaign in the cold ?


They are celebrating a bithday despite the rain .