Maybe when it comes to your graduate essay or your child's homework, borrowing someone else's work is essentially cheating.*
But when it comes to borrowing ideas to help make your meetings better, don't hesitate. Remember, imitation is the sincerest form of flattery.
For example. if you attend a meeting and like the way the buffet tables are arranged in stations (each with a different theme and each spread out to allow all attendees to sample food at the same time), there's nothing stopping you from trying that same thing at your event.
If a colleague says they were able to welcome their attendees by projecting a giant logo of their association on the side of the hotel, there's nothing that says you can't ask your host hotel to project your company logo for your convention on their building.
If you know that a group was able to get discounted Budweiser because they held their meeting in a city with an Anheuser-Busch plant, then why can't you try to do same thing and see if you can get a discount on salt water taffy when you take your group to Atlantic City?
The point being, you can get creative ideas without having to reinvent the wheel and it only takes a keen eye and enough sense to know when an idea is worth borrowing.
* If you borrow someone's idea or talking points without without attribution, you may have stolen intellectual property.