Top Holiday Party Mistakes Guests Make … According to etiquette experts at MSN
1. Arriving late
2. Wearing inappropriate attire
3. Forgetting to RSVP
4. Bringing a surprise guest
5. Not observing dietary restrictions
6. Overindulging in alcohol
7. Interrupting conversations
8. Not engaging in conversation
9. Using your phone too much
10. Leaving without saying goodbye