Hi! I live just outside Brighton and was in town last weekend, the covid rules are pretty much out of the window so most places will be easy enough to get into- just don't say you're a hen do and you'll be fine. I would also recommend the Mesmerist and Bohemia, they both have good music and they're away from West St! Also if the weather is good then I would 100% recommend Revenge Rooftop- you can't book but it is great (depending on what you're looking for, it's definitely not everyone's cup of tea)