Try it on Binder!
RetroLab 0.3.13 featuring RTC with RetroLogo hidden to look more like the classic notebook, served on Binder
Based on RetroLab 0.3.2 on Binder where RTC works with RetroLab and then combined that with taking advantage of ability to hide the Retro_Logo use the Jupyter Logo to get something closer to the classic notebook where Real Time Colloaboration works. Idea is from here. Updated from version 0.3.2 to 0.3.13 (see releases here).