If I want to make a general Nurburgring track day, what classes are most used?

[DesertPenguin]

I want to do this sometimes when I'm just chillin' but when I tried doing it you can't leave it open to any car. You have to make it multi-class and pick four for everyone to choose from. So what do you think will get the most people in the lobby to fool around? GT3 of course, but what other three are most popular among leagues and online groups?

 

[EddyHawk]

GTE, LMP2, LMP1, GT4 or Touring.