I highly encourage you to join a club. If you can't find one you like, start your own!
Before you start your club, decide on things like (I use a book club in this example but, you can adjust for a dinner group,
- a name
- the type of books you want to read (mysteries, fiction, non-fiction?)
- how you want to run your club
- how many members
- where do you want to have it
The hardest part is advertising to get members for your club. I have had good luck with putting up flyers at Starbucks, advertising in the local paper. Meet-up.com is ok but you have to realize that meetup is meant as a 'drop in' event so I haven't had as good of luck when I want permanent members.