Hi bro WB,
I wouldn't agree with you 100% on your conclusion on "picking up gals outside KTVs". It's obvious that each approach has its pluses and minuses. I believe to rule one approach much effective is a personal preference, and in many instances, experience

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I have always relied on mummies to present the gals to me. I find several advantages (at least for me) to do so. Do allow me to list here:
1) Quick overview. I could easily obtain a quick overview of the physical attributes of the gals at a glance – from head to toe, all right in front of me, display in a row. I could compare the specifics of various gals as they are standing side by side, next to each other.
2) Insight information. I could get background information on freshness (in the scene), playability, drinkability, bonkability, origins, etc. from mummies; on the spot or in advance.
3) Flexibility. I select or reject at my own discretion - before or after a gal sit with me. This is a plus compared to a gal that you arranged to sit with you for the first time, after obtaining her contact yourself. If I reject, I ask mummy to bring other batches for me to choose from - on the spot. No hassle.
4) Choices. I could choose from a wide spectrum of batches of gals at one outing. Sometimes it can be four to five batches before I zoom in on one. Sometimes I find the right one from the first batch. I could potentially select from all gals available at the KTV if I want.
5) Filtering. Normally my mummies would do a quick filtering of gals for me, i.e, based on my basic specification. It could be height, look, “slutiness”, age group, or anything such as special desire for the day. With a fundamental filtering process, I I focus my time on how best to enjoy myself.
The above are just some of the thoughts came to my mind and are not exhaustive. As I mentioned, it is a personal preference. If you believe that picking up gals outside KTVs works great for you and hence a better approach, that’s absolutely fine. But for me, I stick to “picking up gals inside KTVs” - at least for sometime to come

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Cheers.