Training in the Gym is not necessary for the Club (though it will generally improve your relationship). If you have kissed him in the kitchen late night after he gets home from the club, this is enough.
He will invite you to the Club when you wake up on a Wednesday morning, as long as you don't already have plans on the following Saturday. You also have to wake up in your Bedroom between 6am and 9am. So if you are not going to sleep in your bed or if your alarm is set for after 9am, you will break the trigger.
Thx for the answer. That's actually my main issue with the game : love the story, scenes, writing, but the event tracking is absolutely horrible : How are we supposed to know we have to wake up between 7 and 9 on wenesdays to trigger something, or not to forget to be in the livingroom at 8 on a specific day, etc... ?
We need a calendar or event reminder on the left sidebar that reminds us what "can" happen today, or at the very least, something a bit more specific in "just the tip".
It is really frustrating to not know how to trigger stuff, especially since some events are tied to specific dates (I've never triggered halloween because I always forget about it and when I do, I'm already several days past it and no save nearby).
Aside from this, thanks for a great game !