Why do you need to ask this question?Do you imagine that service personnel(some of whom may be part-time) have no interest in stamp collecting,naked beach volleyball,Satanism,pet taxidermy and the wide range of other leisure activities that the general population may indulge in?
Or is there perhaps a element of fear that an "Armed Forces Member"may
1Not be house trained and urinate/defecate in inappropriate places
2 May be armed and "go postal"
Or do you have another reason for asking?