I actually don't like lineups, or even the girls meeting you one by one, and I do find them awkward. I prefer to ask the reception for a particular type of girl.

Especially since it's embarrassing to say 'hello' and then start looking over their body!

However, lineups definitely help you to get the best 'pick of the bunch' that suits you.

You could even try to talk to the girls , see which is friendly, will do such and such, etc during the one by one