Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE dorm_amenity (amenity_name VARCHAR, amenid VARCHAR)
TABLE: CREATE TABLE has_amenity (amenid VARCHAR)

### Question ###
Find the name of amenity that is most common in all dorms.

### Accurate SQL ###

SELECT T1.amenity_name FROM dorm_amenity AS T1 JOIN has_amenity AS T2 ON T1.amenid = T2.amenid GROUP BY T2.amenid ORDER BY COUNT(*) DESC LIMIT 1