I like your intent, but speaking as a social hermit, if I read this, I would just be scared to ask. To me, it reads as an entrypoint for an uncomfortable pressured sales pitch.
What I want to hear is:
"If you finish the workshop and you feel like you wasted your time, I will give you your money back."
And then feel free, after politely saying, "I'm sorry this wasn't your thing, here's your refund", please do ask some "why" questions. If I'm eager to talk about it, then feel free to ask me to lunch.
Just don't make it sound like my refund is walled behind a lot of conditions and even more effort.
most of the time it's actually a good starting point for discussions after the workshop, as they can tell me what they found valuable and what they not found valueable.'
additionally my audience is devs, so the && vs || distinction makes it clear that we (can) use the same language
What I want to hear is:
"If you finish the workshop and you feel like you wasted your time, I will give you your money back."
And then feel free, after politely saying, "I'm sorry this wasn't your thing, here's your refund", please do ask some "why" questions. If I'm eager to talk about it, then feel free to ask me to lunch.
Just don't make it sound like my refund is walled behind a lot of conditions and even more effort.