Hamaca you can bring guests for a day pass on the beach ($50 for the whole day which starts @ 10am-5pm) or you can get half day passes which are like $25 and they start @3pm-5pm) and a night pass for the show (about $35 and that starts at 7pm and guests can go to dinner, any of the bars and the show). However you can no longer get disco passes if you are not a guest there. Security is pretty tight and if you are looking to bring back someone who isnt staying at the hotel it most likely won't happen because you wear bands.
The curfew in town is 12am on weekdays and then 2am on weekends. But the disco at hamaca (which is now a sports bar) is open till 3-4AM.
There is a new big colmado called Jumbo Super Fria which is just across the highway across the street from shell. It is quite busy on the weekends, it just opened a couple months ago.
Boca Chica is pretty safe, the people are nice just be aware of your surroundings.
My friends and I go there all the time so if you want to know more, pm me! Have fun!! We will actually be there first week of March! And our other girlfriend will be arriving in late March, you will tend to find her drinking benedicta @ jumbo. One of our bestfriends is a dancer at Hamaca!