Government offices and banks are open Monday thru Friday between 9:00 and 17:30 and have lunch break between 12:30 and 13:30.
Major credit cards like VISA, Mastercard, are accepted at almost all vendors.
Amex and Dinners Club and traveler's checks are accepted in only few vendors.
However, make sure to ask before you purchase a product or service.
You will get a lower price on most of the goods when paid by cash for two reasons:
1. Shops pay 5 % commission on credit card sales to banks