He works as a receptionist in a block of furnished apartments; does he have an excuse for not praying Jumu‘ah or offering the prayers in congregation in the mosque?

I live in one of the Gulf countries, and I work as a receptionist in a block of furnished apartments. There is a mosque fifty meters away from me, and I can hear the adhaan and iqaamah very well, but I cannot go because my boss does not agree, and he says that someone may come to rent an apartment during the prayer time, and he says: Pray here; it is permissible. (So I pray in the reception area with a cleaner who works with me in the apartment block. Please note that this cleaner was Hindu and he became Muslim – praise be to Allah – and he and I pray in the reception room in the apartment block). And we share Jumu‘ah: one time I go to Jumu‘ah prayer, and the next time this worker goes, because we cannot leave the place with no one in the reception area. 
Please note that I could go without my boss knowing, but I am afraid that if I go to offer the obligatory prayers in the mosque and I leave the reception area and I leave that worker there, a renter who is single may come with a woman and take her into the apartment, and the Indian worker does not understand what is going on. That happened to me once but – praise be to Allah – I prevented any evil happening, and Allah is witness to what I say.
I could leave this job, because I am not sponsored by the boss with whom I work, but I think that perhaps I am here and I could prevent problems of zina that could happen, Allah forbid.