The music focus describes how much dancing you can expect
If you want to go dancing Salsa in Bonn, the music announcement tells you more than an atmospheric party photo. “Salsa party” initially names the main focus of the event. Additions like “with Bachata” or “Salsa, Bachata and Kizomba” change your expectations: different dances may be played one after another on the same dance floor.
A list of dances does not tell you how much of each one will be played. The first dance mentioned does not necessarily get the most time or indicate the order. “Mostly Salsa” is more specific than “Latin Mix”, but it is still a qualitative description. A stated percentage would be more precise, without guaranteeing a fixed sequence of songs.
The arrangement also shapes the evening. Several Salsa songs in a row give you a longer stretch of dancing. Frequent changes create shorter Salsa phases. If there are separate rooms, different music may be played at the same time instead. So what matters is the difference between a mixed selection on one dance floor and different music options side by side.
Bachata being on the program does not mean the Salsa music will be worse. It simply means there is room for another dance. If you want to dance these sections yourself, the page about Bachata classes in Bonn covers how to choose a suitable class focus.

