Additional thoughts.
I prefer some semi-girlfriend as I stay for few weeks (and few visits) and I prefer my sex guaranteed in the morning/afternoon sober and not low chance and drunk at 4am. So the night outs for me is more to gather numbers + some day/ internet game to increase my coverage.
Other than the low dating rate/phone numbers ratio and flakiness as mentioned in point 2 above my main problem was wasting time on girls with no real chance to bang, those that use me for lunch/dinners and or drinks in clubs. Few examples of the users girls:
A. 8, super sexy although a bit overweight, asked to meet me near her far metro, choose a sushi place which she already planned what to order before, ate and enjoy the sushi and when I try to touch her hand after when walking she make some disgusted face

B. Girl which came to meet me in the club with her friend(girl), bought them few drinks for couple of hours, tight dancing with my girl but refused a kiss few times. Later they left with Ukrainian guys they met outside the club

C. Girl which I really liked, 7.5, very smart and fun to be with, fluent English, all the dates ended up in restaurant she choose ('I know this great pizza place') although not fancy places and told me some dramatic story (+a tear) about how someone broke her heart and she is not open yet for another boyfriend. When in the last date I told her that as long as we friends I will not buy her lunch/dinner, although she said this is fine and she understand me- I did not saw her again since.
I believe now I am more smart to recognize them and I will use those tactics:
1. Girls who asks for a drink in the club - niet - or get something immediate in return ('I buy drink only after first kiss' expecting a french, 'only after slow dance','I have champagne in my room')
2. Girl which I meet in the club and do not ask for a drink, offer her a drink after a good 15-20 minutes of talking. 2nd drink only in another venue isolating her from her friends or take phone for a later date.
3. 1st date- only drinks. I am not shy to say it, although I might look cheap, I just say directly to them that to avoid girls which uses me for food. If she really likes me she will come. With an exception, If the girl is super hot (8.5) and have no signs of a user then maybe choose quality local restaurant like Katyusha which is relatively cheap, but anyhow the issue is not the cost but rather show her that I expect something in return.
4. Dates in walking distance from my room because of:
a. Easy logistics for invitation to the room after.
b. Girl which invest in travel is more likely to like me as she put some effort on her side. (Although girl C. above invested 3-4 hours per date include travel to get her trophy meal)
c. If a girl flake in last moment, which can happen then I did not waste time to travel.
5. If there is no kiss in the 1st date (after 2-3 attempts)- no 2nd date, and tell her that in the end of date ('So I guess we are only friends'). Or keep her as a friend for meeting her friends and other social events.
6. Day game much more, though it is quite difficult for me because of the mood and cold approaches this will yield better results.
a. When I see the girl in daylight sober (as well as she) I can see her real look and not surprise the day after with a 6 which looked to me 8 in the club.
b. Can lead to instant date and as I have noticed most girls will not say no to a quick coffee even if they are in a hurry.
c. Increase my coverage much more, instead of working only 4-5 hours 2-3 nights per week in clubs, I have all days.
d. Girls which are not clubbers are less likely to be users and have better personality in general.
7. 2nd / 3rd date at her house! After discussion about what she knows to cook, ask her to cook for me and offer to buy the ingredients and some wine.
If you have other ideas for me it would be great.