I placed all my corrections between two (), comment if something is not clear.
Is (to) set a date and find the location.
out the menu, (as well as the) entertainment.
input from other(s) and (assign) them tasks to (complete).
mail the invites out(no s).
or event (got underway, I would)
the guests(s) (were) having a good time.
<span>Niagara Falls is a beautiful and unique place that appeals to a variety of visitors, from honeymooners to people who perform stunts.</span>
Well we use today systems and back then systems
The first one! Hades allows Orpheus to keep the gift of music his greatest love
