As far as having concurrent access to an access point, probably not. Hotspots are designed to prevent this.
While I haven't done this myself, it is probably possible to configure ICS (Internet Connection Sharing) in Microsoft Windows so that other laptops can connect. You'll have to connect to an access point through a separate laptop network connection. Your laptop then behaves like a router and issues IP addresses via dhcp (I believe). Others that are more familiar with ICS will probably add more.
Here's are a couple of ideas to experiment with - no laptop involved but it accomplishes the same. Connect to the hotspot using a bridge like the Linksys WET-11, then unplug the WET11 from the PC and plug it into the WAN port on an access point. You may be able to just plug the WET11 into the WAN port and then connect to the hotspot. The WET11 connection setup can be tricky.
cjtwantstoknow