A visitor decides in about eight seconds whether to keep reading. Most event descriptions spend those eight seconds on the organizer's name and a date the visitor already saw.
Open with the experience
What does the night feel like? Who is in the room? What will they be talking about on the way home? Start there, then get to the logistics.
Answer the objections in order
What is it, when, where, what does it cost, what do I get, is it for someone like me. That is the order people ask, and a description that answers them in that order feels like it was written for the reader.
Write for scanning
Short paragraphs. Subheadings. A bulleted list of what is included. Nobody reads an event page as prose, and a wall of text reads as effort.
Be specific about what is included
"Refreshments" is vague enough to be a complaint waiting to happen. Name what people get. Specificity builds trust and prevents disappointment.
Cut the words that do no work
"Join us for an unforgettable evening" appears on roughly half the event pages in Nigeria and has never persuaded anyone. Neither has "an experience like no other". If a sentence would fit unchanged on somebody else's page, it is not describing your event and it can go.
The test is substitution. Swap your event's name into a competitor's description. If it still reads fine, both descriptions are generic and neither is selling.
Name the people
Acts, speakers, hosts, the DJ. A name a reader recognises does more conversion work than three paragraphs of atmosphere. If nobody on the bill is known yet, describe them concretely instead: "the trio who closed out the last edition" beats "special guests".
Use the first line twice
Your opening sentence is also what appears in link previews when someone shares the page to WhatsApp or Twitter. Write it so it survives being pulled out of context, because it will be.
Write the FAQ you keep answering
Track the questions people actually send you in the week before an event. Is there parking? Can I pay at the door? What time does the main act come on? Every one of those answered on the page is a message you do not have to reply to and a buyer who does not stall.
Close with the practical detail
Doors, dress code, parking, age policy, accessibility. Putting these at the bottom keeps them out of the way of the sell while making sure nobody arrives confused.