Peak traffic on Clubhouse tends to be when people aren't working.
For example in the United States, this means the biggest audiences gather between 5pm and midnight PT (with no major differences between weekdays and weekends).
That said, these times are also more competitive, leaving a lot of opportunity for morning and midday shows—especially for broadcast and news formats.
In other words, no times are dramatically better than others. It's really a function of your target audience and show format!