The police cannot enforce any loitering on the public sidewalk.
If the offenders block the front entry to a business, the agent for the business can sign complaints for a disorderly conduct.
Disorderly Conduct 8-4-010 (f) remains in the public way in a manner that blocks access to a commercial establishment, after being asked to clear the entrance by the person in charge of such establishment
If these criminals sit on the front steps of a business(bar) and don't leave, the owners/bouncers/managers can sign complaints for trespassing. It's only a misdemeanor and the offender will probably by released in 6-8 hrs but if this happens again and again, they will get the message. The police alone cannot lock them up, they need a victim so sign complaints. Make sure to make it abundantly clear that you want to sign complaints.
If one of these thugs bumps you on the sidewalk, sign complaints for battery. You don't have to be injured. There are two different kinds of battery. one for physical contact, and one for injuries.
These thugs don't visit the bars/stores. They run back to Center to hide, and then when the police approach them, they claim they are being picked for cross dressing or sexual orientation. I personally witnessed an "advocate" outside the center the other day telling three individuals that the police are picking on them by arresting them (for actual crimes). The so called advocate then told them how to "beat their case" by making a complaint against the arresting officer.