Can you Hotkey F1-F7 keys?
 

In the european Fiesta is not posible to use those keys. They are assigned to select yourself and your party members.

Can you config them in the USA fiesta?

Same thing, you can't hotkey the F keys..

Technically, you can't because those hotkeys do other actions in real for examples on this laptop f9 decreases volume but you can make other tabs and use SHIFT+1 for example , but if you run out of them you have to throw away some moves which absolutely RARELY happens.(Though i don't think it ever happened)
To make things easier, no you can't use hotkeys in fiesta for moves.
but you can use it as you said for partying and those stuff