In the following escape rooms in Columbus (NE), you must purchase the entire experience at once. You'll only play with the members of your own team and won't be paired with strangers.
The only requirement is to meet the minimum number of players for the room — the price is usually set for the room itself, though it can also depend on the number of players.

You are a group of time traveling treasurer hunters! You have chosen to go after the treasure of one of the most notorious pirates of all time: Black Beard himself. You’ll have one hour aboard The Queen Anne’s Revenge.
Rumor around town is that the old castle on the hill is haunted by it’s former inhabitants. Of course, it’s just a legend… right? Well, you’re about to find out…