Each lists the number of players (not counting myself). In most instances, by design, all players are different players with only a little overlap between groups.
1st & 3rd Mondays of each month = Ice & Fire / Game of Thrones RPG - at the office - 5 players. 6:00 pm to 10:00 pm.
2nd & 4th Mondays = Babylon 5 RPG - at the office - 4 players. 6:00 pm to 10:00 pm.
1st & 3rd Wednesdays = Basic through Immortals 1983 D&D - at the office - 5-6 players. 6:00 pm to 9:00 pm.
2nd & 4th Wednesdays = 5th Edition D&D, World of Beru campaign - at the office - 7 players. 6:00 pm to 10:00 pm.
Thursdays (weekly) = Oriental Adventures, AD&D 1st Edition - at home - 4 players. 7:30 pm to 10:00 pm.
Fridays (every-other) = The One Ring RPG - at friend's home - 7 players. 6:30 pm to 9:30 pm.
Fridays (the other every-other) = Original D&D, now 5th Edition group Late night gaming - at Merlyn's - 4-8 players. 10:00 pm to 1:00 am.
Occasional Saturdays = Discworld GURPS, GM'd by girlfriend - at her house - 2 players (myself and youngest son). Typically 2-3 hours, once or twice a month.
Phew!
So, that's an average of 13 hours per week of actually gaming. And with typically 2 hours prep time for each group, that is closer to 20 hours per week of gaming related activities.
I will likely back that down to just 1 group per week sometime next year (January?) for about a year while I wrap up finishing the degree and various certification and licensing requirements in preparation for internships in the next year or so, and then potentially beginning to be billable for "role-playing game therapy" in 2016 if all goes well!
Happy Gaming!