"a brisk walk in the park"; "a lively gait"; "a merry chase"; "traveling at a rattling rate"; "a snappy pace"; "a spanking breeze"
"when hearts were young and gay"; "a poet could not but be gay, in such a jocund company"- Wordsworth; "the jolly crowd at the reunion"; "jolly old Saint Nick"; "a jovial old gentleman"; "have a merry Christmas"; "peals of merry laughter"; "a mirthful laugh"
"a festive (or festal) occasion"; "gay and exciting night life"; "a merry evening"