That tatoo - did you choose the pentacle? Did you get the headless box, the book of magic and the spirit slates from the mansion? Did you visit Starbucharest and get some yellow chalk? Have you 'played' at being a beggar yet? Got some banis from this sequence?
To get 'cursed' you need wolfbane plant, silver coin, money and the tatoo - did you gather these 4 items? Then you should be able to enter the bar and talk to Casimir about Pyotr. (It may be that you need to see the gypsy to acquire your 'curse' before trying to enter the bar...I had trouble here too and - oh boy another senior moment - don't remember how I solved it exactly. Just tried and tried until I got past that bouncer.
Love, Betty Lou
I am 'the HAT lady"! and "who loves ya BABY?!"