Is there a mikve for women in Barcelona?
There is a new mikve that belongs to the chabad house at Calle Bordeus 25 By appointment +34 6607922805
Is there any eruv in Barcelona?
No Eruv in Barcelona
Where is the Chabad house?
Montnegre Street 14,08029 Barcelona
Where can you buy kosher products?
for the list of more sites here you will find
What hotels are there near the Chabad house?
You can find here a list of hotels
How do I join Shabbat meal?
By registration until Friday afternoon