As a surfer, not so easy.
As a webmaster, you can request this url:
https://chaturbate.com/affiliates/ap...ERTAFFILIATEID (requires a valid ID), and it will return a JSON dump of all online models. Then you can extract fields you want to sort on. Here's an example:
"username": "chloewildd",
"gender": "f",
"current_show": "public",
"num_users": 8018,
"num_followers": 651712,
"seconds_online": 4357,
You can sort for models who have been online for at least 1-2 minutes, then by number of users in their chatrooms.
Enjoy
WG