The first question shouldn't necessarily be:
"Do you want salsa?"
A better question is:
"Who will be in the room?"
Consider:
Where are your guests from?
Knowing the countries and cultures represented can dramatically improve repertoire planning.
What generations are attending?
Older and younger Latin audiences may have very different musical reference points.
Do you need English and Spanish?
If so, consider not just songs but MC responsibilities and communication with guests.
Do you want a concert or sophisticated background music?
A Latin jazz trio and an eight-piece Latin dance band solve very different problems.
Is your event international?
Travel, production, work permits and local vendor coordination should be considered early.
Party Echelon can help determine the right ensemble before providing a final proposal.