you are likely to find Teenager in/at/on Roof. you are likely to find Towel in/at/on Roof. you are likely to find Towel in/at/on Hotel. you are likely to find Clerk in/at/on Hotel. 
Bar is related to Crowd. Crowd is related to Tight. Tight is a synonym of Nasty. Nasty is a synonym of Awful. 
Teenager --AtLocation--> Roof <--AtLocation-- Towel --AtLocation--> Hotel <--AtLocation-- Clerk 
Bar <--RelatedTo--> Crowd <--RelatedTo--> Tight <--Synonym--> Nasty <--Synonym--> Awful 