So you're a little older now, but this shouldn't prevent you having fun and throwing a party.  Here are a few party ideas for people who have moved past their teen years?

 First, know that conceptualizing a party for an adult depends largely on the likes and dislikes of a guest of honor.

 Just like children's parties, you can also throw a themed party for an adult

 1. Depending on the number of guests, you are expecting, set up some poker tables and invite them to have a poker party. You can adorn the venue with poker-related balloons and decorations like card suits, etc.

 2.  Find out the guest of honors favorite movie and have party that is inspired by the particular movie. Whether it becomes as audacious and energetic as Austin Powers or as stylish as Breakfast at Tiffany's.

3. If your guests are energetic and are fans of a reality TV show, then you could have a party revolving around that show.

4. One of the most well liked adult party ideas is the Luau or Mardi Gras.  You can use balloons and decorations around the venue that relate to that theme.  You can keep your guests well entertained by bringing them to a wonderful fantasy.  This kind of party is a hit because your guests can really feel like they are stepping into another world!

5. If your guest of honor is a woman, then the idea of a slumber party will refresh their minds back into their magical girlish slumber party days.  A slumber or pajama party is a great way to have busy girlfriends unite and have some time to spend with each other.

 These are but a few of a great list of ideas for adult birthday parties. Whatever the theme, make sure that the guest of honor have enjoyed his or her day and the guests had a memorable time.