Due to the different taste of culinary and food type, not all Indonesian people can enjoy western food and drink. Most likely they will choose a place that serves Asian cuisine and fusion drink. They are also not a heavy drinker since, in their native country, drinking booze is not common for a lady.
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Go to Asian bars
Therefore, it is unlikely you will find them in beer tavern or wild night clubs. They usually prefer the more sophisticated clubs that serve delicious cocktails and finger foods.
Do not judge their language
English is not commonly spoken in Indonesia, and many Indonesian people only speak conversational English. You have to be prepared to face some language barrier when you interact with them. So speak slowly and use common vocabulary so you can keep the conversation light and fun. They also appreciate people who speak politely and nice, so be a gentleman when you trying to get closer to them.
Bring your Asian pals
These ladies are rarely seen going to a club alone, they prefer to hang out with a group of friends because they love social life. It is a good idea to bring one of your Indonesian or Asian friends when you make the first contact. They will be more welcoming because Indonesian have strong solidarity with people from their native region. It will save you from an awkward moment being the only guy among a group of beautiful ladies.
Be bold and humorous
The Indonesian party girls are fun, daring, and entertaining on the outside, but most of them are actually shy. It is not in their culture to approach a man first, so if you are interested to hang out with them you will need to be more initiative. They also love friendly and funny people, so try to impress them with good humor and friendliness. Take them to the nice local place or unique food joint, and they will be comfortable around you in no time.