Would you attend training Workshop Run over 5 consecutive days?
If you preferred to attend a course 1 day per week over 5 weeks what day would be your preferred day be? In the new financial year I will be launching a training program for Domestic Violence Survivors (in a workshop format).
I'm a bit confused by the question and the additional information. The first way (in the question) sounds as if it would be all 5 classes within the span of 1 week. The other way makes it sound like 1 day a week for 5 weeks. Those are very different formats.
Aside from that, I would say you need to keep your target audience in mind. What time are they likely to get off work? Will you be providing food or beverages? Consider people may be hungry if after work but before they eat. I would say one night a week would be easier for people to attend than one week of 5 days back to back.
Definitely 1 day a week for five weeks, rather than five classes in five days. And that assumes the class is for no more than 2 hours per session. There is no way everyone will attend over 5 consecutive eight hour days.
The reasoning is that no-one has a week where they don't have some commitment they can't get out of. Whether it's the school run, or a dentist/doctor/lawyer appointment, or a gym membership, daily life just gets in the way.
Much easier to schedule a shorter time period with a longer time apart. And you can suffice with basic tea and coffee catering.
If the "blocked-in" approach is favoured, I suggest no more than 2 consecutive sessions per week, after hours. That way, you can have each session running 3 hours (with decent catering) from 6–9pm on Tuesday and Wednesday, on 2 consecutive weeks.
Preferred days of the week is a moot point. Experience tells me Tuesday and Wednesday are easiest for most people, but each audience differs. There will always be those who can't do it, due to the reasons above.
The final alternative is a 3-day block over a weekend. Start at 4pm Friday, run 9-5 Saturday and 9-3pm Sunday. This approach works particularly well for retreats and remote locations, where the attendees are removed from distraction.
However, it will carry a much higher price tag.