How do I best translate the interjection "Entertaining!"? How do I best translate the interjection "Entertaining!" as in "This event is entertaining!"?

I used "娛樂!"; this seems safe since, at worst, it can be interpreted as "Entertainment!", which has roughly the same meaning. I'm thinking that this should have been "在娛樂!" though based on usage described at https://resources.allsetlearning.com/chinese/grammar/Expressing_actions_in_progress_with_%22zai%22.

All examples of the "在 + verb" construction that I've seen involve personal pronouns (such as "我在..." and "你在..."), however, which leads me to be skeptical that this rule is generally applicable.

In other words, is it good Chinese to say "event + 在 + verb" (where "event" is a personified object) (e.g., 端午節在娛樂!) and then shorten that to "在娛樂!"?
'This event is entertaining'
'這個活動很富娛樂性'

'Entertaining' in this context is an adjective, which is translated as '富娛樂性(的)/有娛樂性(的)'in Chinese.

[entertaining] = [富娛樂性]

[entertaining + noun] = [富娛樂性(的) + noun]


'Entertaining event' is '富娛樂性的活動/節目'
'Enjoyable event' is  '讓人享受的活動/節目'
'Fun event' is '有趣的活動/節目'
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Edition:
Patrick Dark wrote:

I changed my text to &quot;娛樂性!&quot;. &quot;富&quot; would seem to be unnecessary since that's implied by use of an exclamation mark.

No, 富  or 有  is necessary in this context
娛樂性 means

(adj) ' of entertainment'

Example: 這是一個娛樂性活動 (this is an event of entertainment / this is an entertainment event)

(n)  'entertaining element'

Example: 這個活動的娛樂性不高 (this event's entertainment element is not high)
富/有娛樂性(的) literally means &quot;~ that have entertainment element&quot;. It is used as an adjectival phrase in a whole. Equal to 'entertaining'(adj) in English.
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