Using "friendliest":
* The friendliest person in the room was the one who kept offering everyone snacks.
* Despite the large crowd, the friendliest staff member made me feel welcome and helped me find what I needed.
* The friendliest dog I've ever met greeted me with a wagging tail and a lick on the face.
* The friendliest cafe in town is known for its warm atmosphere and welcoming staff.
* It was a friendliest reunion, with old friends sharing stories and laughter.
Using "jolliest":
* The jolliest Christmas party I've ever been to was full of laughter and cheer.
* The jolliest group of friends, they always brought the fun wherever they went.
* He was the jolliest person in the office, always making everyone smile.
* The jolliest part of the vacation was spending time with family.
* The jolliest celebration of the year, everyone was in high spirits.
Using both "friendliest" and "jolliest":
* The jolliest and friendliest person in the neighborhood, she always had a smile and a kind word for everyone.
* Our jolliest and friendliest gathering was filled with laughter, music, and good company.
* The friendliest and jolliest team welcomed me with open arms.