1 hour to take visa, 1 hour to reach hotel, 1 hour to dine in , take shower etc, still I assume 2 hours, 1 hour again to come back to airport , 12-5= 7 hours left , I went outside to see stuffs , went to club down the hotel , met some chicks, had fun overall I slept 2 hours only.

It's up to you how you will take it. There is prostitution right outside your door, if they see you single or with guys and come to ask for massage. Beware from them, but if you go to club you will meet Europeans and white chiks too.

Happy travel