You can only do 4 games per day. 1 of your own and 3 from others. so you should be able to get this in 5 days if you get 4 every day. Or 20days if you do it solo
it requires counting on other people to put up a event every day. If you leave a club you will loose the amount of events you have done in that club unless you rejoin it again. you can leave and join as many as you want and do daily events in more than 3 clubs to count on more people.
Example
If you do 3 events in persons A club and leave it to join person B and only do 1 it will only count 1. If you rejoin person A it will count 3 again plus any more you do with person A.
Hope that makes sense.