If you are unable to find an adult gymnastics class, or an adult class isn't for you, know that some gymnastics clubs allow adults to attend their open gyms that are normally geared toward children. It's best to ask in advance, but that can be a great way to get more access to the equipment.
If you consistently bring enough friends, the gym may be open to offering an adult-only session! The other cool thing about attending an all-ages open gym is that children and parents will notice you and may want to join in the fun! This helps spread the adult gymnastics movement!
Be sure to use #adultgymnastics on social media to further this movement to make the sport more accessible to adults.