psssyt pssyt where you from? its not a friendly start of conversation. Probably they will be trying sell you something or give you directions (even you dont need them) expecting a tip back. Simply say NO and keep going. We have learnt our lesson on our second day on independent scooter trip to Matanzas. They hussle we got was increlible. Usually guys in their 20's... Even speeding up on scooter didnt help in getting rid of very pushy gu on the bike
Cuban people are not allowed to bother the tourists. The law is rigorous about it. So you can go safely all over. Just be careful if someone wants to help you insistently. Be nice and firm. Anyway don't be too much mistrustful and you can meet a lot of friendly people.