Hey, y'all, I was just watching Pat Sloan's daily video and what do you know a block in the Socialites #2 series (block 9) using our dear little 2.5s. Here is the link to the free pattern from the Fat Quarter Shop. Easy peasy and could be used for a super scrappy quilt that might diminish your 2.5 stash. I haven't paid attention to the other blocks in the socialites series, but this one jumped out as a perfect one for our group.
Edit: I added a link that did not work when I double checked it. Go to
https://www.fatquartershop.com/. In the search box (upper right of the page) type, Socialites 2, Block #9 and it will pop right up for you.