Hi I placed a review on this hotel.(OOps sorry it was on another website, I will cut and paste it.)
I go to Spain regularly on Stag Do's and this is one place I would not recommend, great for my family but not a single sex party for the following reasons.
1 ) The hotel is predominantly German 18-30.
2 ) It is at least a 25 minute walk into the centre
3 ) The nightlife is lame and def not geared around a stag doo
4 ) The hotel bar is awful and not all inclusive
I know this advice is not very positive but after 2 visits to Callela I know you dont want to go here on a Stag Doo.
My advice would be to start again and to go Majorca or Benal/Fuen