Don't worry about the door pasted a sign "member only", it just a common way to reject female in Taiwan.
Just push the door and come in.
Here is a place to grab a drink and chat with friends.
Customers are not teenagers, fit for a man not for a boy.
This bar is a little bit close to Japan style, some activies around Japan culture or outfits.
Some people says cocktail is delicious, you should try.