In the following escape rooms in Greensburg, 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.

Becoming a wizard isn’t easy. You’ve traveled to the magic school and taken the admissions exam, but didn’t pass. As a result, a horrible curse has been placed on you to ensure you don’t attempt further magic as a muggle.
Yesterday, while paying respects at Mr. Black’s wake where the entire family has gathered for the first time in ages, his wife died suddenly...