1) The picnic turned into an omnium gatherum of friends, family, and neighbors.

2) The flea market was a true omnium gatherum of vintage items.

3) The community fair was an omnium gatherum of food vendors, artisans, and live music.

4) The library's book sale attracted an omnium gatherum of book lovers.

5) The estate sale featured an omnium gatherum of antiques, artwork, and collectibles.

6) The street market was an omnium gatherum of handmade crafts and local produce.

7) The classroom was an omnium gatherum of students with diverse backgrounds and interests.

8) The music festival was an omnium gatherum of different genres and performers.

9) The art exhibit was an omnium gatherum of paintings, sculptures, and mixed media pieces.

10) The online forum became an omnium gatherum of discussions on various topics.

11) I'm sorry, but "Omnium Gatherum" is not a commonly used word in English, and I couldn't find a suitable example sentence for it.