For the new MIT rents you have to see the big picture. I made a rough calculation, and than some conclusions.
Cost of running a bar in new MIT per month.
rent 50000
Initial cost (bar stools, refrigerator, ventilators, billiard, music ect) 5000
music license (50000 a year) 4000
police money 3000
personel (1 cashier and at least 7 ladies or LB) 50000
electricity and water 5000 and ice 3000 8000
That is 120000 a month. Sure i forgot some items, and you can discuss the money involved in each item, but it comes down to at least 4000 Bath profit you must make a day before the owner can make money. For simplicity I take they they only sell beer(I know they also make money from bar fines and more profit on lady drinks). A bottle per box cost around 35 to more than 40 Baht (san Miguel). So if you sell at 80 Baht, you must sell at least 100 bottles a day before making money. The rent in the old MIT was around 25000 Baht. If they sold the beer than at 70 Baht they also had to sell around 100 bottles a day (the beer 3 years ago was slightly cheaper). So a mark up of 10 Baht covers the higher rent. Rent is a major cost, but the other items add to more than that. The point is that you have to have enough customers. Many new owners have already bars. So if the have regular customers base they will come visit the new bar. When you start a bar for the first time, you will have a very difficult first half year, so you must have deep pockets to start and hope for the best.