Eating at the invitation of someone who trims and shaves his beard?
It is mentioned in a Hadith that the invitation of transgressors (Fasiq people) should not be accepted, and since people who shave and trim their beards are also transgressors, therefore, if it is not against prudence (Maslahat), their invitation can be rejected. Especially when there are prohibited acts (Munkarat) in the gathering of the invitation, the ruling of prohibition becomes even more emphatic. (Kitab al-Nawazil / Vol: 16 / Page: 75)