You could catch the Rose Canyon bike path at the northeast corner of Mission Bay and ride up to UC San Diego (my "home away from home" in my encore career). We have an on-campus bike shop "where cycling is academic," and many of the students ride older bikes (as do I). USD and SDSU are even closer to where you are staying.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069