a special event where people can enjoy a particular activity or thing

a media-fest 媒体节

used in combination with other nouns to create a word for a situation in which there is a lot of something

They met at a recent economic gabfest (= an occasion when there is a lot of talking) in Washington. 他们是最近在华盛顿举行的一次漫谈会上认识的。

The documentary is a fascinating clipfest (= a film that includes lots of different clips). 这部纪录片包括诸多短小剪辑片段，引人入胜。