With the Arts Center set to send its troubled, but critically acclaimed “World of the Pharaohs” exhibit packing on July 7, your opportunities to catch the show are dwindling. Tonight’s “Pharewell to the Pharaohs” party, from 5:30 p.m. to 8 p.m., looks to be your best opportunity. Sponsored by the Times, it’s a members-only party, but non-members can join, at a $10 discount, for $45 and get all the benefits of membership in the year to come (like admission to parties and special events and discounts). There’ll be free martinis and hors d’oeuvres and music by jazz band Gypsy Blue.