In the following escape rooms in Livermore, 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.

Your team of time-traveling investigators has been hopping from decade to decade doing research. Unfortunately, due to a malfunction you are all now trapped and can’t get to your machine!
You are about to enter the late Professor’s study. It has been untouched for many years. Since his passing, we have gotten information indicating that the original Declaration of Independence was stolen and is hidden in the study.
Ruh-Roh...can you help Mystery Inc. save the town from disaster?