Popularity is determined through achieving certain standards in your café. This is the measure that ensures a healthy customer flow in your cafe. The higher the popularity, the more customers will enter your cafe.
A cafe can reach a maximum of 100 popularity, and will be decreased by issues in your cafe.
Static 100 popularity
If your cafe remarkably exceeds the standards set by the game, your cafe will have a static 100 popularity. This means, no matter how many issues you have in your cafe, the popularity will always stay at 100. Richly decorated cafes are known to have static 100 popularity.
Parties also give your cafe a static 100 popularity while the party is ongoing.
Popularity issues
These issues decrease a cafe's popularity and are generally recommended to be fixed in order to keep the popularity score up. These can be found by clicking the popularity meter, or looking at customer's thought bubbles.
Issue
Decrease
Why it appears
How to fix
Dirty Floors
-1 per stain
There is a patch of dirt on the floor. It can be a water spill, coffee stain or a patch of footprints
There can be a maximum of five dirt patches in your cafe, regardless of cafe size
Your cafe lacks decoration items, or that it has only cheap items
Unlike the other issues, "increase your decoration quality" does not rely on the number required for each item but rather, on the amount needed to be spent on your cafe.
The game considers not only floor and wall decorations, but the cost of everything in the decoration tab (this means, including chairs, tables, wallpapers, floor tiles, counters, etc.)
Quality > quantity. If your cafe uses expensive items for its basic necessities (chairs, tables, counters, stoves), the "increase your decoration quality" may not pop up even without a single floor/wall decoration
Unlike the other issues, "increase your fun quality" does not rely on the number required for each item but rather, on the monetary value of your fun items.
Quality > quantity. Since the game considers the value and not the number of fun items in your cafe, you can have one expensive item rather than a dozen of cheap fun items
Entertainers cost a lot and therefore, satisfies the 'increase your fun quality' faster than other fun items