Summarize:

Before you start making a club, you need to come up with a subject. If drawing is your hobby and you want to meet more artists, that can be your theme. Keep the theme as broad as possible. You can make a group about knit tags, but it may be difficult for you to find enough people who share that interest to grow a group out of it. Instead, make your group about knitting in general and share your love of knit tags during group time. Consider what clubs exist in your area. Does your theme fill a need in your community? Search online or in gathering grounds such as a local community center, churches, or schools for similar clubs and avoid copying their theme. Most clubs start small with a few interested people. You can do this with a few of your friends. It doesn't matter if these people intend on staying long-term if they help you get the club up and running until you can recruit more members. Other options include advertisements such as flyers posted on bulletin boards and telephone poles, posts to social media, and words in town bulletins and newspapers. Try asking among acquaintances such as fellow church members. Someone may refer someone they know to your group. School groups usually require a few interested people to be recognized and receive funding. Some colleges, for instance, require a minimum of ten members. Check with your school. Many schools require you to have an advisor to lead the club, grow it, and make it successful. If you're forming a club outside of school, you aren't required to have the help, but a school advisor can help you register your club, find a meeting location, provide guest speakers, and more. Choose an adult who will take responsibility, stay interested in the group, and be responsive to your group's needs. Usually you can find this person among teachers you're familiar with or professors in your study branch. Once you have a few people who will attend your first meeting, settle upon a location. You can do this by asking your prospective members for a place that's good for them. Often this location is someone's house or a restaurant since new groups don't have many members or money to spend on renting public space. If you're in school, your advisor or the school can refer you to their classroom or a room where there won't be a class around the time you want to meet. When your group grows, you can consider renting larger spots such as a room at a church or a community center. Now that you've got a place to meet, set a time. If you already have several members interested in joining the group, discuss with them a time that's best for the majority of people. Often this will be after school or work or evenings on weekdays. It's important to get as many people involved in the group as possible in order to establish the group and help it grow. Once the group starts expanding, you'll be less able to plan around the schedules of every member. Check with your school to find out what form you need to submit to be recognized as a group. If you're doing this outside of a school, you won't have to do this, but everyone else needs to respond to a club commissioner or outline the group on an official application. Clearly write out the name of the club and what its purpose. You will likely need information such as your faculty advisor's name, budgeting concerns, and group activities. Remember to make the information on the form as clear as possible. Confusing the commissioner or the school board that will vote on your application will surely cause your application to be rejected.
Brainstorm a theme. Find interested people. Find an advisor. Choose a location. Pick a time. Submit your registration.