Moreover, you can also search for popular hashtags using a keyword or adding a link to an existing post. Just choose a variant that is the most convenient for you, copy the best hashtags and add to your posts. Too simple to be a reality? But it's real, my friend.
By the way, if you really have a cafe and want to use Instagram to attract visitors and to establish a direct dialogue with your already existing clients, 10 Restaurant Promotion Tips That Even Newbies Can Master
will greatly help you.