Hi Ed! Mia here. I co-manage LOFT Coworking spaces here in the Philippines.
The concept of coworking is the same in different parts of the world, although, we have to consider clients who come from different work cultures. I agree with @alex, as it varies from person to person, etc. Not sure if this happens all throughout the Coworking Spaces here in the Philippines but most of our monthly members actually go on a daily basis – for Hot Desks, at least. Except Sundays as we are closed.
Weekly membership plans are very unlikely. It’s either they’d go for a day or two (I assume most of these types of clients are freelancers) or go monthly, and go on a daily basis (mostly young/start up companies).
The most flexible plan, and the best value for money, I guess for people would be for them to pay x amount for a specified x number of hours. That caters to basically anybody. (i.e. Online tutors - they have a fixed time for their classes. We can offer them XX PHP for 40 hours. They can come as they need, anytime they want.)