Clams on the Cape
Gotta agree with Bivalve here....both your options are best avoided, with Cap'n Frosty's (in Dennis BTW not Hyannis) being the worst of the two. If you want close to Hyannis try Cooke's (no ambiance, however, and you order at the counter and they bring it to you). Sir Crickets is good no frills choice in Orleans. Sesuit Cafe is also pretty good with picnic tables on the harbor in East Dennis.