One of the hardest parts of being a writer (other than actually sitting down to write... and editing once you've actually finished something... and getting someone to read what you've written...) is that it gets a bit lonely from time to time. Nothing but you and your computer screen, and often a blank computer screen at that. Not exactly socially stimulating.
Meeting other writers, both wannabes and seasoned authors, can be a huge boost to every aspect of your writing - your motivation, your dedication, your willingness to get through rough spots, your technical skills and your knowledge of the industry. Not to mention, getting connected is one of the best ways to get published.
If there's any chance whatsoever that you can get together with an actual, physical group of writers, go for it! There's no better way to boost your writing career. Check out Local Writers' Associations of America to find a group near you.
I live in Virginia, and like to write science fiction and fantasy. If you're like me, you might find Mid-Atlantic Science Fiction and Fantasy Writing Conventions of interest.
Online groups are great as well. Here's a review of online writers' groups. And if you're up to the challenge of writing a novel in a month, the community aspect of national novel writing months like NaNoWriMo can't be beat.