Shouldn't the English be where can I go to meet pretty girls?

I think someone considered it slang because when it's written/said improperly like this, it sounds kinda cute/funny - like you're 6 years old or maybe you're someone without a big-city education in China. You can avoid sounding like this (or do it intentionally) if you just pay attention to your tones.

There are bunch of these kinds of fun-ish misspellings (e.g. 木有 = 没有， 偶的天啊 = 我的天啊).

Change the Women to Wo. Singular

Aren't there too many pop slangs?

Its a sad world when a guy goes online to ask fellow lonely dudes in random undisclosed global locations where to meet pretty girls...

what about "我能在哪儿认识美女？"

Finally! We get to the point of this entire course!