attender, patronne, supporter, sponsor, frequenter, protector, fautor, proponent, assertor, shield, more...

antagonist, adversary, opponent, rival, enemy

regular, VIP, loyal, occasional, first-time, high roller, corporate, individual, group, more...

great, generous, royal, liberal, wealthy, powerful, old, former, noble, munificent, chief

big name in tequila,   beethoven dedicatee,   regular customer,   art supporter,   art backer,   supporting member,   one in a cafeteria,   benevolent backer,   powerful supporter,   honorary member,   chief supporter