Krappee,
If you want to see the old and unusual, walk East on the alley, turn right (South) up Constitucion, then right (West) on Arturo 123 Fuente, right (North) down Ninos Heros, then back right on Callejon Coahuila. You will see grandmothers, homeless, eating disorders, and every other novelty you can imagine. I rarely even walk on Coahuila since it's almost like being on Revolucion (for tourist only).
HK and AB are the only bars with decent numbers of women in them during the weekdays. Maybe 4-5 in Tropical. La Chavelas, Malqueridas, and others in the alley are usually empty. Don't even have to mention Chicago. I agree with goodquestions11 that AB is better than HK during the day if you're looking to hook-up. However, HK has better dancers.
I would highly recommend Edith and Marisol in front of the Edwardo Hotel. .30 for everything IMO is the best deal in town. During re-load, I like the shaving cream show at HK. You can have a great time for a few Washingtons. Make sure you wear a short sleave shirt. Download the free drink coupon from the internet and write your email address on the back. It will save you $4 on your second drink.
Looking forward to your report,
dirtemail