thx for suggestions, i did it someway, if someone else have the same problem here is how i coded the form CSS, excluding the fields phone, seats, comment:

#eme-rsvp-form textarea {display: none; border: solid #000 0px;}

#eme-rsvp-form th {display: none;}

#eme-rsvp-form select {display: none; }

#eme-rsvp-form input[name=”bookerPhone”] {display: none;}

#eme-rsvp-form td[text=”Commento”] {display: none;}

.eme-rsvp-form tr {background: #fff; border: solid #fff;}

the line:

#eme-rsvp-form th {display: none;}

completely hides the left column with fields descriptions, i didn’find another way to hide only the excluded fields descriptions…

another question for the dev: how can i insert a text to

#_REMOVEBOOKINGFORM_IF_REGISTERED

something like this:

“you’ve already subscribed this event, do you want to cancel your subscription?”