Happenings (Local Events Feed)

Re-submitting for code-review again.
Unused method argument - `last_scrape_at`. If it's necessary, use `_` or `_last_scrape_at` as an argument name to indicate that it won't be used.<br>Unused method argument - `inter_scrape_delay`. If it's necessary, use `_` or `_inter_scrape_delay` as an argument name to indicate that it won't be used.