The Hyatt is good, but if you don't trust the Chicas, there is always the option of the San Roque hotel just around the corner from Habanos.
Go out of Habanos, facing the Marriot, go left towards Beriut restaurant, turn the corner and the the hotel is on the left. Here you can buy condoms and get a room for $20.
Most girls who stand outside of Venetos choose to go to San Roque hotel.
I would advise nothing more than going to Habanos. Venetos is not as a friendly atmosphere, and of course is in a sterile casino. Of course you have the odd one or two simply interested in your wallet, but many are sincere lovely girls who are great to talk to. If nothing else! Like many have said on here, sometimes getting a rapport with an English speaker is more fun than taking a non-speaking English Chica who you would rate as a 9 or 10. The percentage of girls who are in your face wanting your cash is very low. As for the poster who commented that it was too dark and did not go in. Walk in, give it 10 seconds and hey presto your eyes adjust!!
You do see the same faces in Habanos, but I would say 80% there are different girls from the previous night. I met a stunning Columbian called Carmen who wanted $160. She was one of the most sexiest gorgeous girls I have ever seen in my life. Others were mostly 7's or 8's and wanted 100, I was very tired though and wanted to meet her the next night. She was not there and as said, 80% different crowd, so no embarrassing issues of picking another girl the next day with the one you had the night before staring at you!
If a girl approaches you and won't say no, I give the line that I'm in Hotel Panama. Non Chicas. They soon leave you alone as this hotel does not permit girls.
Just a warning, a guy warned me about girls traveling in pairs outside of Habanos at closing time. They ask you for a threesome, follow you to the cash-point and then rub you up, let you caress them whilst the other is pick pocketing you. The trait of a Panamanian is generally polite and sincere and trustworthy unless they are black. I'm not being racist, it is just the cultural way in Panama.
If you are there for a week or two, use Tinder. There are some stunning girls. Point out from the start you are only there for a short while. The girls who are interested will NOT delete you. The white girls normally have cars and will look after you and show you around too.