Alex's friends and family continue to search for him in Lisbon and the surrounding areas. They are working with the authorities. I am friends with his family, so I am privy to some information and communication from his friends and family. According to communication from one of Alex's friends (may be some English/Portuguese translation issues with this, not sure):
"Alex was seen inside Urban Beach Club around 3:35am talking with an older lady with suspicious behavior (age about 40-50). Shortly after Alex went also outside the club, the lady followed him. They disputed about how to get to his hostel with attempts of Alex wanting to get away. The lady went again inside the club not sure if she talked a short moment about him with a security guy. In general the behavior of the lady seemed pretty strange. He then walked away alone, in the direction of the city, along the coastline. He walked very determined but drunk. The time he walked away was about 3:45am."
I'm sharing this on Websleuths because I know it is an awesome, smart, curious, capable community of problem-solvers, and I am really hoping you guys can offer any insight/suggestions/assistance. I do not have a direct line of communication with the searchers, nor with the authorities, so please understand that I won't be able to ask or answer a lot of questions, but I just can offer the information I already have.