It all depends on the days you're going. In Oase, around 5/6 it will be the busiest with girls, with both the morning shift and the evening shift being there (this last for a few hours). I usually go on fridays and have always found the guys are in the minority... I would expect the same during the week, with maybe a bit more men on Saturdays... and if there's something relevant happening in the Messe: all nights will be packed. If you really want to avoid crowds, go early... this will also mean less girls. The prettier girls usually also start later (although the gorgeous Marie and Elena - if she is back - always start early).

I've had days where there were a handfull of men and 50 girls; this just means they'll be all over you and won't leave you alone. Fun one the one hand, but it gets tiring after a while (this assuming you can deal with telling them 'no'). In the end I had a few regulars that weren't really awake yet and helped me out by 'sleeping' on top of me . Just to say that a good guy/girl ratio isn't always the best for a relaxing day.