In a real way, a dojo refers to the people training together, not the building, the instructor, or the business.
When visiting a prospective studio or dojo, do your best to look at who is training. If they are sincere in training themselves and create a space which encourages others to be sincere about their own training, it is likely a good place.
If there seems to be more competition than companionship it might not be a good martial arts environment. If it feels there is a heavy focus on an appearance or attitude or aggression, it might be compensating for weak foundation in martial arts movement mechanics.
Find somewhere were you can be yourself while training, and where you can train to better yourself in line with who you are.
I hope this can be useful for you. As always, contact us if you have any questions or concerns and we will be happy to connect you to answers!