Favorites: Flag interest on an activity
I would like to see a feature in the website to let me flag to myself that I am interested in signing up for an activity, that I can return to with a filter and decide whether to sign up or let it slip. Personally, I would not care if my interest flags were visible to others.

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Gabrielle Orsi commented
I like this idea. Sort of like ebay.com's "watch list", where you mark items that you are considering?
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Courtney McShane commented
There are so many great hikes, climbs, scrambles, activities that it's hard to decide what to choose on any weekend day.
Similar to Redfin house hunting, I recommend the option to "Favorite" an activity/course which gets added to a list of your favorites or "x-Out" which removes that activity from your view.
This way, a user wont have to screen shot, write down, or re-search for an activity which piqued their interest after scanning through the many options.
Cheers!