Possible topics:

* what folks do with their yard or garden; ideally playable with a municipal park for those without a yard

* pets or wildlife

* arts and crafts

* favorite hobbies, perhaps broken into categories like active, quiet, creative, etc.

* clothing colors and styles, especially for folks into capsule wardrobes or minimalist challenges

* tell us about your state or province; this gets more fun the wider group of people it attracts

* worthy causes or activism

* photo or other image scavenger hunt


You might also like to browse allbingo because a new thing this year is several challenges including a separate "meet and greet" post with a questionnaire, which can serve as a friending meme or discussion post. Here's an example from June's Food Fest.