We're having a holiday party in our home this year. I only want to serve beer, wine, and assorted sodas and juices. I have a friend who insists I should also serve mixed drinks and/or other spirits because not everybody wants a choice of wine or beer. I told her that I really don't want to spend extra money on alcohol and spend time mixing drinks. She said I was being cheap and should at least buy a bottle of vodka. Am I being cheap and petty?