If you are at the HP Pavilion, the De Anza Hotel is close and very nice. A restored art deco era hotel. If you are at the convention center (more likely, I would recommend the Fairmont, or better yet, the hillton or mariott (both adjacent to the convention center. the Crowne Plaza is nice also and is across from the convention center. While there, be sure to eat at Original Joe's and Henry's High Life.

Think you're at the San Jose HP Pavilion for your convention, right? My advice would be to find the convention center on Google Maps and use the "search nearby" function to locate the closest hotels. The Crowne Plaza is one nearby option: http://vacation.away.com/hotels/travel-ld-cid2494-san-jose-hotelid24265-crowne-plaza-hotel-san-jose-downtown-hotel.html