Apostrophes 1

Can you tell if the apostrophes are used correctly in the following sentences?

1. Samson asked the cashier for the key to the men’s room.
2. Nathan and Simone’s descriptions of the crime did not match.
3. You’re coffees getting cold.
4. After the hockey game, Shauna went to the Smiths’ house for hot chocolate.
5. Casey’s 6s and 0s looked the same.
6. The director told us that it’s time to get down to business.
7. Yoshi lived in London during the 1960’s.