Someone will befriend you in some way maybe asking you to take picture of him giving you some tips of the area, They will then see you want to grab a drink they might even take you to a place and buy you a drink them they will go to another location the scam location. At this new place they will sit down order drinks then some others will sit with you ordering drinks at the end they will expect you to pay the bill and it can be 100s or even 1000s in Euros… If don’t have cash they will forcibly take your credit card.
Tip – Be careful who befriends if it feels to forced it probably is.