Having an office party is a great idea. Invitations are optional and could be verbal or by office email. If it's a big event like Christmas or someone’s birthday, decorations are a must but be sure to check with the person in charge before you put up anything. Catering, if possible, is the best way to go or you could just order from your favorite restaurant. The only foreseeable problem is throwing co-workers into a social situation. Because of the dangers of drinking and driving, and the new sexual harassment laws in the workplace, be as conservative as possible when it comes to beverages. Games and activities will still be appreciated like a Murder Mystery Game or a Treasure Hunt or even a "guess who" game where you give clues about the "employee" and whoever guesses first, wins the prize or party favor. Having some fun desserts like a cake, cookies, ice cream and other favorites will be the perfect end to this party.