Ketubot 7: The Universal Practice of... Sex

The prohibition against the wedding night for a virgin to be on Shabbat, and permitted on a festival. But why is it permitted then? How does it apply across the board to everyone? Plus, a specific case about a historical case. [Who's Who: Helene the Queen] Also, Sheva Berachot - the blessings of a wedding that require a minyan for recitation. But how do we know that there's a requirement to have 10? It's learned from a biblical verse. But it's a machloket which verse that is. Plus, the time of these Sheva Berachot.